Alesis QUADRAVERB Plus

USERS MANUAL ADDENDUM

INTRODUCTION

The QuadraVerb Plus is an upgraded version of the original QuadraVerb. The many new features that are now available are made possible by a simple software update, which requires only the replacement of its EPROM (Erasable Programmable Read Only Memory). The hardware of the QuadraVerb remains unchanged. The operation of the QuadraVerb Plus is identical to the original QuadraVerb and all original features of the QuadraVerb are retained in the QuadraVerb Plus. All patches originally written for the QuadraVerb will sound the same on the QuadraVerb Plus. This addendum only describes the new features. Full instructions on the operation of your unit can be found in your User's Guide.

NEW FEATURES

New features available on the QuadraVerb Plus include Sampling, Ring Modulator, and Resonator configurations, plus the addition of Multi Tap Delay, Auto Panning, and Tremolo Modulation on original configurations where these features are applicable. In addition, the Quadraverb's extensive MIDI implementation has been greatly enhanced to include real-time parameter control of parameters such as the Delay, Volume, and Feedback for each of the 8 individual taps in the Multi Tap Delay configuration, as well as the Auto Panning and Tremolo's Modulation Speed and Depth. Also, the Quadraverb Plus lets the user adjust parameters such as the Ring Modulator's Spectrum Shift, Output Up/Down Mix, and Delay/Reverb Up/Down Mix as well as the Pitch and Decay of the Resonator. This allows the user to achieve a greater level of creative control than ever before. MULTI TAP DELAY - The Multi Tap Delay is a new type of delay available in the 5 BAND EQ->PITCH->DELAY configuration where up to 8 taps can be defined in the delay. The Delay Time, Volume, Panning, and Feedback Amount can be individually adjusted for each tap as well. SAMPLING - The QuadraVerb Plus now has the ability to make a brief digital recording of the input being fed to it, commonly known as sampling.
AUTO PANNING - Auto Panning allows a signal to automatically pan from side to side (when the outputs are connected in stereo) at a selected rate and depth. TREMOLO MODULATION - Tremolo Modulation is an effect which automatically varies the volume at a selected rate and depth, simulating the "Surf Sound" tremolo effect found on old instrument amplifiers. RING MODULATOR - The Ring Modulator is a specialized amplitude modulator that produces an output that contains only the sum and difference frequencies of its input waveforms' harmonics. It is most useful for generating metallic, bell-like sounds. RESONATORS - A Resonator generates a pitch in addition to the original input signal, making it possible for a nonpitched sound to become pitched. There are 5 resonators in the QuadraVerb Plus.

MULTI TAP DELAY

The Multi Tap Delay is a new type of delay available in the 5 BAND EQ->PITCH>DELAY configuration. In this mode, up to 8 taps can be defined in the delay. The Delay Time, Volume, Panning, and Feedback Amount can be individually adjusted for each tap. The cumulative delay time of all 8 taps is 1500 milliseconds. The Master Feedback control adjusts the global amount of feedback from all the taps, and the Mix Delay volume adjusts the amount of delay in the effect output. The Delay Time is relative to the previous tap, which means that when Tap #1 is delayed, all of the following Taps are delayed by the same amount as well. The following illustration shows how the timing of adjacent taps behave when a single delay time is modified (Tap 2 delay is changed from 250ms to 500 ms in this example): FIGURE 7 MULTI TAP DELAYS A

250 ms TAP 1

250 ms TAP 2

500 ms TAP 3

125 ms TAP 4

500 ms TAP 2

0.5 Sec

1.0 Sec

1.5 Sec
In Figure 7A, Tap #1 is set at 250ms, Tap #2 is set 250ms behind Tap #1 (500ms from the beginning), Tap #3 is set 500ms behind Tap #2 (1 second from the beginning). In Figure 7B, an additional 250ms is added to Tap #2 which means that it now occurs at 750ms (instead of 500ms as in 7A), and Tap #3 now occurs at 1250ms (instead of 1 second in Figure 7A).

SELECTING THE MULTI TAP DELAY CONFIGURATION
Multi Tap Delay is accessed through the 5 BAND EQ->PITCH->DELAY configuration. To select the configuration, first press the CONFIG button, then press the VALUE buttons until the display reads: CONFIGURATION: 5BAND EQ>PCH>DL
The block diagram of this configuration is as follows:

FIGURE 8

5 BAND EQ->PITCH->DELAY BLOCK DIAGRAM (with Multi Tap Delay)
DELAY 1 FEEDBACK AMP 10 DELAY 2 PAN 1 AMP 2 DELAY X PAN 2 AMP X DELAY 8 PAN X AMP 8 PAN 8

FEEDBACK 1

FEEDBACK 2

FEEDBACK X

FEEDBACK 8

5 BAND EQ

PITCH OUTPUT EQ OUTPUT MULTI TAP DELAY OUTPUT EFFECTS OUTPUT

DIRECT PRE/POST EQ

DIRECT OUTPUT
EDITING THE MULTI TAP DELAY PARAMETERS
1) To access the Multi Tap Delay parameters, press the DELAY button. The display will then read: DELAY TYPE: STEREO DELAY Press the "Up" VALUE button until the next selection reads: DELAY TYPE: MULTI TAP DELAY
This page allows the selection of the Mono, Stereo, Ping Pong (as from the original configuration) or the new Multi Tap Delay.
2) Pressing the "Up" PAGE button will select the next page which will read:
DELAY INPUT 1: POST EQ Pressing the VALUE buttons will select the other input choice which will read: DELAY INPUT 1: PRE EQ This page selects whether the input signal to Input #1 of the Delay section is derived either before (Pre) or after (Post) the EQ. This page is also identical to the original QuadraVerb configuration.
3) Pressing the "Up" PAGE button again will select the next page which will read: DELAY INPUT MIX: 1<-00 -> PITCH Pressing the VALUE buttons will select the mix between Delay Input #1 (which was selected on the previous page) or the second Delay input which is dedicated to the output of the Pitch section. This page is also identical to the original QuadraVerb configuration. 4) Pressing the "Up" PAGE button again will select the Delay Tap to be edited, which will read: TAP NUMBER: 1 Pressing the VALUE buttons will select the desired Tap. The range is 1 to 8. 5) Pressing the "Up" PAGE button again will select the Tap Delay Time page, which will read: TAP 1 DELAY TIME: 0125 millisecs

Pressing the VALUE buttons in milliseconds. The tap displayed on the first line. exceed 1500 milliseconds allowed to increase.
will select the desired Delay Time measured number selected on the previous page is If the cumulative delay time of the 8 taps (1.5 seconds), the delay time will not be
6) Pressing the "Up" PAGE button again will select the individual Tap output volume to be edited, which will read: TAP 1 VOLUME: 50 Pressing the VALUE buttons will select the desired Output Volume. range is 0 to 99. The
7) Pressing the "Up" PAGE button again will select the individual Tap Panning to be edited, which will read: TAP 1 PANNING: LEFT<-00->RIGHT Pressing the VALUE buttons will select the desired Panning from Left to Right. The range is Left 99 to Right 99. 8) Pressing the "Up" PAGE button again will select the individual Tap Feed-back to be edited, which will read: TAP 1 FEEDBACK: 00% Pressing the VALUE buttons will select the desired amount of feedback. The higher the feedback value is set, the more repeats will occur. The range is 0 to 99.
9) Pressing the "Up" PAGE button again will select the Master Feedback to be edited, which will read: MASTER FEEDBACK: 00% Pressing the VALUE buttons will select the desired amount of feedback. This is a global parameter, scaling the feedback of all taps at once. The range is 0 to 99.
PLEASE NOTE: As a short cut, while page four through eight are active, the Tap Number under edition can be incremented by pushing the DELAY switch. The Tap number will fold back to 1 when Tap 8 is passed.
MODULATING THE MULTI TAP DELAY PARAMETERS
The Delay, Volume, Panning, and Feedback of each Tap, as well as the Master Feedback can also be modulated by any MIDI modulation source. This can be accomplished by referring to the "Modulating the Parameters" section of the QuadraVerb Users Manual on page 66.
EDITING THE EQ, PITCH, DELAY AND REVERB PARAMETERS
The parameters and mode of adjustment of the EQ, Pitch, and other Delay sections are identical to the original 5 BAND EQ->PITCH->DELAY configuration as found on page 76 of the QuadraVerb Users Manual.

SAMPLING

The QuadraVerb Plus now has the ability to make a 1.55 second sample of the input being fed to it. The maximum record time is 1.55 seconds. In playback, the sample start and length times can be altered for special effects or to trim the playback of the sample to the actual start point of the sound. The sample can also be played back in its entirety (one shot) or continuously repeated (looping). The playback can be further altered by having a variety of sources to trigger the sample. These sources include an incoming audio source, playback from the front panel, or a MIDI note on, note off, and note number/pitch message, which allows the sample to be played back from a MIDI keyboard.

SELECTING THE SAMPLING CONFIGURATION
Sampling is accessed through new Configuration 8. All Sampling parameters reside under the DELAY button while in the SAMPLING configuration. To select this configuration, first press the CONFIG button, then press the VALUE buttons until the display reads:
CONFIGURATION: SAMPLING The block diagram of this configuration is as follows:

FIGURE 4

CONFIGURATION 8 SAMPLING
TRIGGER AUDIO TRIGGER MIDI NOTE Looping Off On Start Length
SAMPLING OUTPUT TRIGGER PITCH

RECORDING A SAMPLE

There are two ways to record a sample. In the first (the easiest to get a good sample), the QuadraVerb Plus waits for the incoming audio to trigger recording. The second method requires the user to initiate recording by pressing the BYPASS switch on the front panel.
RECORDING BY AUDIO TRIGGER
1) Press the DELAY button. The display will read: SAMPLE PLAYBACK: ONE SHOT This page is primarily for playback and can be bypassed for now. 2) Press the PAGE up button three times. The display will then read: AUDIO TRIGGER SAMPLING: OFF 3) Press the VALUE button to select the Audio Trigger On mode. The display will read:
AUDIO TRIGGER SAMPLING: ON 4) Now press the BYPASS button. The display will read: WAITING FOR AUDIO THRESHOLD
5) Send a signal to the QuadraVerb Plus. When the first LED (-18dB) lights, the input signal has passed the audio threshold and recording has begun. For the best recorded signal, raise the input level control so that the -6dB LED lights. The signal will be distorted if the red "Clip" LED lights.
RECORDING FROM THE FRONT PANEL
1) Press the DELAY button. The display will read: SAMPLE PLAYBACK: ONE SHOT This page is primarily for playback and can be bypassed for now. 2) Press the PAGE up button three times. The display will then read: AUDIO TRIGGER SAMPLING: ON 3) Press the VALUE button to select the Audio Trigger Off mode. The display will read: AUDIO TRIGGER SAMPLING: OFF 4) Now, when ready to sample, press the BYPASS button. The display will read: SAMPLING.
For the best recorded signal, raise the input level control so that the -6dB LED lights. The signal will be distorted if the red "Clip" LED lights.

PLAYING BACK A SAMPLE

There are three ways to play back a recorded sample: from the front panel, from an audio trigger, or through MIDI. Playback from the front panel (manual playback) would normally be used when you want to manually trigger a recorded sample. Playback from an audio trigger is normally used when replacing one audio source with a recorded sample, as in the case of replacing a snare drum on a tape track with a better recorded sample. Playback through MIDI enables a recorded sample to be played from a MIDI keyboard.

PLAYBACK FROM THE FRONT PANEL
1) Press the DELAY button. The display will read: SAMPLE PLAYBACK: ONE SHOT One Shot means that once a sample is initiated, it will play until the end of the sample and then stop. 2) To begin playback, press the EQ button. The sample will play to the end and then automatically stop. To playback again, press the EQ button again.
3) The volume of the sample can be increased or decreased by the OUTPUT control of the QuadraVerb Plus.
1A) If you wish to have the sample play back continuously until told to stop, press the "Down" VALUE button. The display will read: SAMPLE PLAYBACK: LOOPING 2A) To begin playback, press the EQ button. The display will then read: PUSH EQ TO STOP SAMPLE PLAYBACK 3A) To stop playback, press the EQ button again. The display will then read: PUSH EQ TO TRIG. SAMPLE PLAYBACK 11 11
To play again, repeat steps 2A and 3A.
PLAYBACK FROM AN AUDIO TRIGGER
1) Press the DELAY button. The display will read: SAMPLE PLAYBACK: ONE SHOT 2) Press the "Up" VALUE button until the display reads: SAMPLE PLAYBACK: AUDIO TRIGGER Any incoming audio signal that passes the threshold (makes the -18dB LED light) will cause the sample to play.
PLEASE NOTE: The recorded sample can still be manually played back by pressing the EQ button. "Looping" is not available in the Audio Trigger mode. Once a sample is audio triggered, the -18dB LED must turn off before sample can be re-audio triggered.

PLAYBACK FROM MIDI

It is also possible to MIDI trigger the recorded sample from a MIDI keyboard. This can happen in two ways. In the first, called MIDI One Shot, when a MIDI note on is received by the QuadraVerb Plus, the recorded sample will play back to the selected end of the sample, regardless of how long that the key is depressed. In the second way, known as MIDI Gated, the sample will stop playing when the key has stopped being depressed. It is also possible to select the note on the keyboard that will trigger the sample at its original pitch, as well as the highest and lowest notes that the QuadraVerb Plus will respond to. TO SELECT THE MIDI TRIGGER MODE 1) Press the DELAY button. The display will read: SAMPLE PLAYBACK: ONE SHOT

2) Press the PAGE "Up" button until the display reads: 12 12
MIDI TRIGGER: GATED In the MIDI Gated mode, the sample will stop playing as soon as the key is released. 3) Pressing the VALUE "Down" button once will select the next display, which will read: MIDI TRIGGER: OFF When the MIDI Trigger is in the "Off" state, then the QuadraVerb Plus will not respond to MIDI note on/off information.
4) Pressing the VALUE "Up" button two times will select the next display, which will read: MIDI TRIGGER: ONE SHOT
In the MIDI One Shot mode, the recorded sample will play back to the selected end of the sample, regardless of how long that the key is depressed.
PLEASE NOTE: If the playback mode is set to "Looping" and MIDI Trigger is set to One Shot, the sample will play indefinitely until the mode is changed or the sampling configuration is deselected.
TO SELECT THE MIDI TRIGGER NOTE 1) Press the PAGE "Up" button. The next display will read: MIDI TRIGGER LOW LIMIT: 000 2) Press the VALUE "Up" button to select the lowest desired note to trigger the recorded sample. Note number 60 = Middle C. 3) Press the PAGE "Up" button. The next display will read:
MIDI TRIGGER BASE: 060 The Base value is the note where the sample will play back with no pitch change. 4) Press the VALUE buttons to select the desired note. Note number 60 = Middle C. 5) Press the PAGE "Up" button. The next display will read: MIDI TRIGGER HIGH LIMIT: 127 6) Press the VALUE "Down" button to select the highest desired note to trigger the recorded sample. Note number 60 = Middle C.

PLEASE NOTE:

Because of the nature of sampling, the timing of the sample as well as the pitch will change substantially the farther away from the base note that it's triggered, with the higher notes sounding like "munchkins" and the lower notes like "giants". This is a normal phenomena that occurs during sample playback. The pitch of the sample will follow within a 2 octave range and will loop back into the range if any note information falls outside of the 2 octave range. For instance, if the base note has been selected to note number 60 (Middle C or C3) and note number 84 (C5) is played, the sample pitch will be triggered 1 octave higher than the bass (C4).

ADJUSTING THE SAMPLE PLAYBACK LENGTH
In any playback mode it is possible to adjust the sample playback length in order to either ignore unwanted sampled material or "dead air", or in order to make a loop more musical. This is accomplished in the following manner. 1) Press the DELAY button. The display will read: SAMPLE PLAYBACK: ONE SHOT
2) Press the PAGE "Up" button. The display will read: SAMPLE START: 0.00 SECONDS
This page will determine at what point in the sample that playback will start. 3) Press the VALUE button to select the desired Start time. The start can be anywhere in the sample in 10 millisecond steps. When the start of the sample is moved, the length of a loop is maintained unless the end of the sample is reached before the loop duration. In this case, the loop duration will be from the start to the actual end of the sample regardless of the loop duration. However, the duration value will remain intact and in effect as soon as the user adjustment of the loop start will permit the proper length. The range is from 0 through 1.5 seconds in 10 millisecond increments. 4) Press the PAGE "Up" button. The display will read: SAMPLE LENGTH: 1.55 SECONDS This page will determine the length of the sample playback. 5) Press the VALUE button to select the desired Sample length time.
ADJUSTING THE SAMPLE MIX PARAMETERS
The MIX section allow for adjusting the relative balance between the direct signal, and the recorded sample playback signal. 1) Press the MIX button. The display will read: DIRECT SIGNAL LEVEL: + 50 This page controls the level of the direct signal. 2) Press the VALUE buttons to select the desired direct signal level. The range is 0 to 99 with 0 being off. 3) Press the "Up" PAGE button to select the next page. The display will read: SAMPLE PLAYBACK SIGNAL LEVEL: + 50 This page controls the output level of the recorded sample.
4) Press the VALUE buttons to select the desired recorded Sample signal level. The range is 0 to 99 with 0 being off.
PANNING AND TREMOLO MODULATION
Auto Panning and Tremolo modulation of the EQ output has been added to the EQ->PITCH->DELAY->REVERB and 5 BAND EQ->PITCH->DELAY configurations. Auto Panning allows a signal that has first been routed through the EQ section of either of the above configurations to automatically pan from side to side at a selectable rate. Please note that the effect will only be heard when both the left and right outputs of the Quadraverb are in use. Tremolo Modulation means that a signal that has first been routed through the EQ section of either of the above configurations will vary in volume at a selected rate. Both the depth and rate of the Auto Panning and Tremolo Modulation can be varied and/or modulated by any MIDI modulation source.

SELECTING THE PANNING OR TREMOLO CONFIGURATION
Auto Panning or Tremolo Modulation is accessed through the EQ->PITCH>DELAY->REVERB or 5 BAND EQ->PITCH->DELAY configurations. To select either configuration, first press the CONFIG button, then press the VALUE buttons until the display reads: CONFIGURATION: EQ>PCH>DL>REVERB or CONFIGURATION: 5BAND EQ>PCH>DL The block diagram of this configuration is as follows:

FIGURE 5

EQ->PITCH->DELAY->REVERB BLOCK DIAGRAM

PITCH OUTPUT

DELAY OUTPUT

REVERB

REVERB OUTPUT EFFECTS OUTPUT

EQ OUTPUT

PANNING/ TREMOLO

FIGURE 6

5 BAND EQ->PITCH->DELAY BLOCK DIAGRAM
DELAY OUTPUT EFFECTS OUTPUT
EDITING THE PANNING OR TREMOLO PARAMETERS
1) To access the Auto Panning parameters, press the MIX button. The display will then read: DIRECT SIGNAL: PRE-EQ
2) Press the "Up" VALUE button until the next page reads: DIRECT SIGNAL: POST-EQ PANNING or DIRECT SIGNAL: POST-EQ TREMOLO 17 17
This page allows the selection of the direct signal going either Pre-EQ, Post-EQ (both with no panning or tremolo), or Post-EQ with Panning or Post-EQ with Tremolo. 3) Pressing the "Up" PAGE button repeatedly will select the Panning Depth or Tremolo Depth page which will read: EQ PANNING DEPTH 99 or EQ TREMOLO DEPTH 99.depending on if Panning or Tremolo was selected above. Pressing the VALUE buttons will select the desired amount of Panning or Tremolo Depth. The range is 0 to 99.
Pressing the "Up" PAGE button again will select the Panning Speed or Tremolo Speed page which will read: EQ PANNING SPEED 30 or EQ TREMOLO SPEED 30.depending on if Panning or Tremolo was selected above. Pressing the VALUE buttons will select the desired amount of Panning or Tremolo Speed. The range is 0 to 99.
MODULATING THE PANNING OR TREMOLO PARAMETERS
The Auto Panning Speed and Depth and the Tremolo Modulation Speed and Depth can also be modulated by any MIDI modulation source. This can be
accomplished by referring to the "Modulating the Parameters" section of the QuadraVerb Users Manual on page 66.
The parameters and mode of adjustment of the EQ, Pitch, Delay and Reverb sections are identical to the original EQ->PITCH->DELAY->REVERB configuration as found on page 48 of the QuadraVerb Users Manual, and 5 BAND EQ->PITCH->DELAY configuration as found on page 76 of the QuadraVerb Users Manual.

RING MODULATOR

The Ring Modulator is a specialized amplitude modulator that produces an output that contains only the sum and difference frequencies of its input waveforms' harmonics. It is most useful for generating metallic, bell-like sounds. The Ring Modulator in the QuadraVerb Plus creates two signals (Up and Down) from the initial input signal. The up output signal is a version of the input signal with its harmonic spectrum shifted up, while the down output signal is the input signal with its harmonic spectrum shifted down. The amount of shift is identical for the up, and down outputs, and is specified in Hertz by the Shift Amount parameter. The following illustration shows how the output spectrums relate to the input spectrum.

FIGURE 1 RING MODULATOR HARMONIC SPECTRUM SHIFT

Amp 500Hz

INPUT SIGNAL

Amp 1.2KHz 2.2KHz 700Hz

UP OUTPUT

10KHz 10KHz 10KHz

PITCH SHIFT AMOUNT = 200Hz Amp 300Hz 800Hz 1.8KHz

DOWN OUTPUT

In Figure 1A, the fundamental (or frequency that we perceive as the instrument's pitch) is 500 Hz. The harmonics are normally even multiples of the fundamental, or 2 times the fundamental, 3 times the fundamental, 4 times the fundamental, etc. In this case, the 2nd harmonic is 1KHz (1000 cycles per second), or twice the fundamental of 500Hz, and the 4th harmonic is 2KHz, or 4 times the fundamental. In Figure 1B, the Pitch Shift amount has been set to 200Hz, which means that the fundamental and all of its related harmonics are shifted up by the same 200Hz amount. This means that the fundamental has been shifted to 700Hz, the 2nd harmonic is now at 1.2KHz (normally it should be 2 times the fundamental, or 1.4KHz), and the 4th harmonic is 2.2KHz (normally it should be 2.8KHz). In Figure 1C, the Pitch Shift amount is shifted down by 200Hz, which means that the fundamental and all of its related harmonics are shifted down by the same 200Hz amount. This means that the fundamental has been shifted to 300Hz, the 2nd harmonic is now at 800Hz (normally it should be 2 times the fundamental, or 600Hz), and the 4th harmonic is 1.8KHz (normally it should be 1.2KHz). Since the ratio between the input signal's harmonics is not preserved, the resulting sound is drastically different from the original. While usual ring modulators only provide a fixed mix of the Up and Down spectrums, the 20 20
algorithm implemented in the QuadraVerb Plus gives independent access to the Up and Down version of the original spectrum. The ring modulator treatment will be most valuable for special effect on voices or sound effects.
SELECTING THE RING MODULATOR
The Ring Modulator is accessed through new Configuration 6, which is RING MODULATOR->DELAY->REVERB. The block diagram of this configuration is:

FIGURE 2

CONFIGURATION 6 RING MODULATOR->DELAY->REVERB BLOCK DIAGRAM

RING MODULATOR CONTROL:

Spectrum shift amount Ring Mod. output shift mix Delay/Reverb shift mix

DELAY TYPES

Mono Delay - 800ms Stereo Delay - 400ms per side Ping-Pong Delay - 400ms

REVERB TYPES

Plate 1 Room 1 Chamber 1 Hall 1 Reverse 1

UP DOWN

RING MODULATOR OUTPUT

DIRECT SIGNAL

To select this configuration, first press the CONFIG button, then press the VALUE buttons until the display reads: CONFIGURATION: RING->DL->REVERB
EDITING THE RING MODULATOR PARAMETERS
1) To access the Ring Modulator parameters, press the PITCH button. The display will then read: SPECTRUM SHIFT: 100Hz Pressing the VALUE buttons will select the desired Spectrum Shift. The range is 1 Hertz to 300 Hertz in 1 Hertz increments.
2) Pressing the "Up" PAGE button will select the next page which will read: RING MOD OUTPUT MIX: DOWN<-00->UP Pressing the VALUE buttons will select the desired mix of Up to Down Ring Modulator outputs. 3) Pressing the "Up" PAGE button again will select the third page which will read: DEL/REVERB INPUT MIX: DOWN<-00->UP Pressing the VALUE buttons will select the desired ratio of Up to Down Spectrum Shift which can then be used as input for the Delay or Reverb. This differs from the second page in that it is possible to send a different mix of Ring Modulator outputs to the Delay and Reverb than the mix that will appear in the MIX section of the QuadraVerb Plus.
MODULATING THE RING MODULATOR PARAMETERS
The Spectrum Shift, Ring Modulator Output up/down mix, and Delay/Reverb up/down mix can also be modulated by any MIDI modulation source. This can be accomplished by referring to the "Modulating the Parameters" section of the QuadraVerb Users Manual on page 66.
EDITING THE DELAY AND REVERB PARAMETERS
The parameters and mode of adjustment of the Delay and Reverb sections are identical to the original LEZLIE-> DELAY->REVERB configuration as found on page 69 of the QuadraVerb Users Manual.

RESONATORS

Instead of just processing a signal such as Delay or Reverb, a resonator generates a pitch in addition to the original input signal. There are 5 resonators in the QuadraVerb Plus. The initial resonating frequency of each resonator can be individually adjusted (tuned) on a chromatic scale. The resonator frequencies also chromatically follow incoming MIDI notes. The decay time of the five resonators can also be adjusted simultaneously.

SELECTING THE RESONATOR CONFIGURATION
The Resonators are accessed through new Configuration 7, which is RESONATOR->DELAY->REVERB. The block diagram of this configuration is as follows:

FIGURE 3

CONFIGURATION 7 RESONATORS->DELAY->REVERB BLOCK DIAGRAM

RESONATOR CONTROLS:

Decay time Frequency
Mono Delay - 720ms Stereo Delay - 320ms per side Ping-Pong Delay - 320ms
Plate 1 Resonator 1 Resonator 2 Resonator 3
Room 1 Chamber 1 Hall 1 Reverse 1

Resonator 4 Resonator 5

RESONATOR OUTPUT
To select this configuration, first press the CONFIG button, then press the VALUE buttons until the display reads: CONFIGURATION: RESONATOR>DL>REV
EDITING THE RESONATOR PARAMETERS
1) To access the Resonators parameters, press the PITCH button. The display will then read: RESONATOR GATE MODE: CONTINOUS This page determines if the resonators are gated by an incoming MIDI note on/off. If the MIDI GATE is on, the input of each resonator will be connected to the input signal only while its corresponding MIDI gate is on. Consequently, when a note is released, the output of the resonator driven by this note will decay to zero even if the input signal is active. Pressing the VALUE buttons will select the MIDI GATED mode.
RESONATOR GATE MODE: MIDI GATED PLEASE NOTE: When playing the resonators from MIDI, the five pitches are determined by up to five notes played on the MIDI keyboard. When used this way, the resonator's tunings should be set to zero for proper keyboard tuning.
2) Pressing the "Up" PAGE button will select the next page which will read: RESONATOR DECAY: 49 This page simultaneously adjusts the decay time of the five resonators. The range is from 0 through 99, with 99 being maximum decay time. Pressing the VALUE buttons will select the desired decay time. 3) The next five pages adjusts the initial pitch of resonator 1 through 5. Pressing the "Up" PAGE button continually will select each Resonator page which will read: RESONATOR 1 TUNE +00 SEMI TONE RESONATOR 2 TUNE +00 SEMI TONE. up to Resonator 5 Pressing the VALUE buttons will select the desired tuning of the resonator. The range is -24 to +36 semi tones, and covers 5 octaves from C1 through C6 (0=C3).
MODULATING THE RESONATOR PARAMETERS
The Resonator Decay can also be modulated by any MIDI modulation source. This can be accomplished by referring to the "Modulating the Parameters" section of the QuadraVerb Users Manual on page 66.

The QuadraVerb 2 handles mono or stereo sends at all system levels. The input circuitry of the QuadraVerb 2 can easily handle +4 dBu levels (+19 dBu peaks), while having enough input and output gain to interface with the lower -10 dBV signal levels of many recording systems.
The QuadraVerb 2 may be connected to a mixing console in several ways. Usually, it is connected to the auxiliary send and return controls of the mixer. Another method of interfacing is to connect the unit directly to the insert send and return patch points of the channel that is to be effected. Still another way of interfacing the QuadraVerb 2 to a mixer or recording console would be in-line across the output of your mixing console. This last setup would be used only if you needed to effect the entire mix.

Using the Aux Sends

Generally, mixing consoles provide two types of auxiliary sends: pre-fader sends for creating a cue (headphone) mix, and individual, post-fader effect sends. Typically, if a mixer has more than two sends per channel (4, 6 or 8, perhaps), the first two sends are reserved for the cue sends, while the remaining sends are used to feed effects. If you are using a mixer with more than two sends, connect the QuadraVerb 2 using post-fader sends. Using a mixers aux sends poses a distinct advantage: each channel has its own level control feeding the aux output (and eventually the QuadraVerb 2 input). This allows you to make a mix of any channels you want to go to the effects by using the individual channels aux send levels on the mixer. Most consoles also have aux master controls, which set the overall level of each aux output. Coming back from the QuadraVerb 2s outputs into the mixer, you have two options: connecting to dedicated return inputs, or connecting to channel inputs.
The former is good if your mixer provides dedicated inputs (called returns) for effect devices like the QuadraVerb 2. If your mixer does not have these, or you have already used them all, consider connecting the QuadraVerb 2 to channel inputs or unused tape returns.
Setting the Effect/Dry Balance
No matter where you connect the output of the QuadraVerb 2 into the mixer, you are in control of the balance between the mixers channel inputs (the uneffected signal being routed to the aux sends and the Mix) and the effect returns coming from the QuadraVerb 2. The effect returns generally should only contain effected signal, and not have any uneffected signal mixed with it (since these two signals are blended together at the mixer). If the Program you are using has the LR IN connected to the LR OUT, you may be getting some dry, uneffected signal at the return. Generally, this is not desirable, since the "dry" signal is already being heard through the original channels fader. Therefore, in a mixer application you will want to cut the QuadraVerb 2s Programs path which connects the inputs to the outputs. This can be done in three ways: Go to the Mix parameters to bring down the direct level Go to the Routing function of each program and remove the patch cords connecting the inputs to the outputs Turn on the Global Direct Signal Mute function. This is the easiest method.

Example Programs

The following are descriptions of the three example Programs in the Preset bank.

96: VerbOfMyDreams

This Program is fairly simple in design, using only 3 Blocks to provide EQ, Delay and Reverb. It is designed for a mono audio source to be connected to the [R] INPUT. In the display, you can see the R IN routed to the first Block, which is defined as a 3Band Parametric EQ. The M output of the EQ then is routed to the next Block, which is a Mono Delay. The M output of the Delay is then routed to the next Block, which is a Room 2 Reverb. The L output of the Reverb is routed to the L OUT while the R output of the Reverb is routed to the R OUT. Also, the R IN is routed to both the L and R OUT, to combine the original dry signal with the wet signal coming from Block #3. The EQ Block is used to tailor the sound before further processing occurs. You should make adjustments here based on the signal you feed through it; if the higher frequencies of the input signal do not sound as good through the Reverb as the mids and lows, try attenuating them in the EQ. The Delay is used to thicken the sound by adding a few very fast echoes. The Reverb adds ambiance, as if you were in a large chamber, and completes the total effect. Using the Mix function, you can adjust the output level of the Reverb Block and the Direct Signal to create the balance you are looking for.

97: Guitar Rack

This Program includes two Pitch Blocks feeding a delay Block, into another Pitch Block, then into a Reverb Block, and finally yet another Pitch Block. This is a prime example of the flexibility the QuadraVerb 2 offers to programmers. The Program creates a thick, swirling, ambient effect that greatly enhances an electric guitars sound. The R IN is routed to Blocks 1 and 2, as well as the L and R OUT. The first two Pitch Blocks are defined as Pitch Detune type, but are set to different detune amounts to create a thicker sound. The Delay Block is a Mono Delay which provides a very quick slap back by using a small delay time and no feedback. The third Pitch Block provides a Stereo Chorus which swirls the detuned, delay signal and feeds directly to the outputs. The Delay Blocks output is also fed into a Hall 1 Reverb which provides ambience to the un-chorused signal. The Reverbs stereo signals are routed to the QuadraVerb 2s outputs and mixed with the Stereo Choruss signals. Meanwhile, the Reverbs mono output feeds a Stereo Flanger whose stereo signals are also combined with the Stereo Chorus, Reverb and the original input signal at the outputs. Again, use the Mix parameters to create just the balance you want.

The Preset bank cannot be permanently changed. If you edit a Program selected from the Preset bank, you will be able to make changes, but when you attempt to Store the edited Program, it will be stored into the User bank (in the selected number location).
To store an edited Program into memory:
Press the [STORE] button.
The [STORE] buttons LED will light. The display will read:
STORE AT: XX "nnnnnnnnnnnnnn"
whereby XX is a Program number from 0 to 99 and nnnn is the name of the program that will be overwritten. Both the Program number and name will be flashing.
Turn the [VALUE/ENTER] knob to select the Program number location in the User bank to store the edited Program into.
Press the [VALUE/ENTER] button.
The display will momentarily read:

PROGRAM STORED

After storing, the User Program location you chose will automatically be selected and shown in the display (example: if you edited Program 13 and stored it into location 25, Program 25 will be selected).

Bypassing Effects

At any time you can bypass all effects at once, thereby allowing the direct signal to pass through the QuadraVerb 2 unchanged. This can be done in two ways: by pressing the [BYPASS] button on the front panel; or, by connecting a footswitch to the [BYPASS] jack and pressing the footswitch.
Each time either the [BYPASS] button is pressed, or the footswitch connected to the [BYPASS] jack is pressed, Bypass mode is toggled on and off again. When Bypass mode is turned on, the [BYPASS] button's LED will be lit.
When Bypass is enabled, all Effect Blocks are momentarily disabled and will not have audio routed from them to the outputs. However, if the Program does not route the LR Inputs directly to the LR Outputs, you will not hear anything.
In order for the Bypass mode to function correctly, make sure the LR Inputs are routed to the LR Outputs and that the Global Direct Signal Mute function is turned off (see below). If the inputs are not routed directly to the outputs, the [BYPASS] button acts more like a mute since nothing will be heard when it is enabled.

The LR IN

These appear on the far left side of the Block section in the display. They are not selectable with the [< BLOCK >] buttons. This is because we are always routing from the LR IN and, in keeping with our convention, all routing is done from the destination Block, not from the source.
Reaching the Outputs - LR OUT
The L OUT and R OUT are separately selectable (like Blocks) for routing purposes. Whichever Block is determined to be the final effect in the chain (whether your Program has one or multiple Blocks), it needs to be routed to the LR OUT in order for you to hear it. This can be done in mono (if just one channel is needed) by routing one or more Block outputs to either the L OUT or R OUT, or in stereo by routing to both the L and R OUT.

Limit Handling

Within the limits of the available sample memory and DSP, the Blocks can be linked in any order, in almost any combination of the four basic types. For instance, you might have two EQ Blocks followed by four pitch Effect Blocks; or one Block of each (EQ,
Pitch, Delay) type on the left channel and one of each type on the right channel, followed by a stereo reverb (a total of 7 Blocks). Because the QuadraVerb 2 is so flexible, occasionally you will have a combination of effects and/or parameters that may overtax either the available memory or DSP power on board the unit. When you attempt to program beyond the QuadraVerb 2s capabilities, no harm will be done but one of four error messages will appear in the display indicating you have exceeded the units limits. This means you have to create your Program in a slightly different manner to obtain the final result you want. If you are into programming computationally intensive combinations of effects, you may have to learn to compromise in certain situations. There are four categories to consider with regards to programming limitations: DSP power, Effect Memory, LFOs and Microprocessor Assistance. DSP. The DSP (Digital Signal Processor) chip inside the QuadraVerb 2 is what processes all signals in the digital domain and creates all of the effects (sometimes with the assistance of the microprocessor). The DSP chip has a limit to how many instructions (per sample) it can handle. Some effects take up a large number of instructions, while others take only a few. Generally, reverbs are big DSP hogs, while most other effects use relatively small numbers of instructions. When you route patch cords between Blocks, each connection requires 1% of DSP power (2% if the level is not 0.0dB). If you run out of DSP power, the error message DSP IS FULL briefly appears. If this happens, consider substituting an effect that uses fewer instructions for one of the more DSP demanding effects you may be using. Effect Memory. The on-board effect memory is primarily used for delay effects, but sometimes used by reverb effects (for pre-delay). In total you have 5.4559 seconds (or 5,455.9 ms), although the maximum delay time any single delay effect may have is 5 seconds. Once this memory has been allocated, the error message EFFECT MEMORY IS FULL will briefly appear when you try to apply more delay time to a delay effect than there is memory available. Note: If you have several delay Effect Blocks in a Program, they will share the total amount of effect memory that is available. If the total of all delay times equals that of available effect memory, you will not be able to increase any of the delay times until you decrease the delay time of one or more of the delay Blocks. LFOs. The term LFO comes from the days of early synthesizers, where tremolo and vibrato effects were created using a Low Frequency Oscillator to modulate another oscillators pitch, or the filter or amplifier volume. In effect devices, LFOs are used to create effects such as flanging, chorus and Lezlie speaker emulation. The QuadraVerb 2 provides 4 LFOs per Program. Most pitch effects use 1 LFO, but some use 2. Also, some of the larger reverb effects use an LFO for a bigger sound. Example: If you try to add an effect using an LFO and you have already used all four LFOs in other Effect Blocks, the error message OUT OF LFOs briefly appears. Microprocessor Assistance. Like most digital electronic music and audio products, the QuadraVerb 2 uses a microprocessor to run all basic functions like recalling, editing, comparing, storing, and renaming Programs, etc. However, some of the effect types use the microprocessor to assist the DSP chip in creating the effect, and the microprocessor is capable of assisting in this way for only one effect per Program. Three Pitch effects use the microprocessor: Phasor, Stereo Lezlie and Ring Modulator. Only one of these three may be used per Program. Example: If you try to create a Ring Modulator effect type when either a Phasor or Stereo Lezlie effect is already in use in the Program, the error message BLOCK COMBINATION NOT ALLOWED briefly appears.

connection.

Level Setting
The input level is an important parameter, the setting of which can have a drastic impact on the resulting effect. Its default setting of -6.0dB represents the halfway point of its range. 0 dB is the loudest using no attenuation, while OFF mutes the route entirely. You should set the level to accommodate the headroom the effect will need. For example, even if the front panel input levels are below clipping, if you boost an EQ band, it can distort the internal processor of the Q2. The -6.0 dB setting will accommodate most blocks, but if there is clipping internally (when the red LED's flash
on input), lower the input level. You may also need to lower the routing level if a block is receiving signal from more than one source. On the other hand, the best signal-to-noise ratio is achieved when signals are as loud as possible without clipping. In the case of a one-block program, the routing from the block to the L and R outputs should be at 0.0 dB. Multiple-block programs will need lower settings to avoid clipping at the output blocks.
Press the [VALUE/ENTER] button to set the level from -48.0dB to 0dB.
D Press the [BLOCK >] button to move the pointer to the OUT R Block.
The OUT L and OUT R are selectable as separate destination Blocks.

The display will flash:

ADD ROUTE FROM: EQ 1 MIX
Note that the flashing patch cord now connects the EQ1 M to the OUT R and if we turn the [VALUE/ENTER] knob, we can see the following possible input sources for the right output:
ADD ROUTE FROM: EQ 1 IN MIX ADD ROUTE FROM: INPUT LEFT
Note that the route from Input Right cant be added, because its already there as part of the default patch #99. As we scroll through the various input sources, the display will flash each ones patch cord while selected. Let's choose EQ 1 MIX (this is the Mix output of our EQ, which is Block 1). This is not to be confused with EQ 1 IN MIX, which is the signal being received at the EQ Blocks input.

Value/Enter

The [VALUE/ENTER] knob is used to adjust values in the display. However, it is also a button. Depending on what you are editing, the [VALUE/ENTER] knob will work in either one of two modes: Immediate. The desired value is selected by turning the [VALUE/ENTER] knob, and immediately takes effect. This is normally the case when selecting Programs (see next page) and for adjusting most of the numeric parameters. Deferred. The desired value is selected by turning the [VALUE/ENTER] knob, but the new value will only take effect after the [VALUE/ENTER] button has been pressed. The newly selected value will flash in the display until it is selected in this manner. If you change the parameter back to its original setting, the value in the display will not flash. Also, if you go to another Page, or select another Function (by pressing any button), the parameter will be left unchanged. If you went back to look at the previous parameter, it will be set back to its original setting. This mode is used for parameters that cause architectural changes such as changing a Blocks function, effect type, and routing signals.
For Power Users. The [VALUE/ENTER] button can also be used to step through Pages in the currently selected mode. Except when a value is flashing on and off in the display, the [VALUE/ENTER] button ordinarily doubles for the [PAGE >] button. If you change the value of a parameter that uses deferred mode,, you must press the [VALUE/ENTER] button to enter the new value (the display will stop flashing), and then you can press it again to move to the next Page (or to the next parameter, if more than one parameter appears in the display). This is a feature for power users who want to be able to move around the various pages quickly and make changes as fast as possible.

Program

This button is used, in conjunction with the [VALUE/ENTER] knob, to select the Program number in the display. When its LED is lit, turning the [VALUE/ENTER] knob selects a different Program, using one of two modes: Direct or Deferred. Direct mode immediately recalls the displayed Program as you turn the [VALUE/ENTER] knob. Deferred mode lets you scroll through the Programs in the display by turning the [VALUE/ENTER] knob, but you must press the [VALUE/ENTER] button to actually recall a Program. You can choose between either Direct or Deferred mode by going to Program Page 2, using the following steps: To select either Direct or Deferred Program Selection Mode:

In order for Bypass mode to function correctly, make sure the LR Inputs are routed to the LR Outputs and that the Global Direct Signal Mute function is turned off (see below). If the inputs are not routed directly to the outputs, the [BYPASS] button acts more like a mute since nothing will be heard when it is enabled.

< Block >

This rocker button allows you to position the Block pointer above Blocks 1 through 8 or above L OUT or R OUT. These buttons are used in conjunction with the [TYPE], [ROUTING], [PARAMETER] and [MIX] buttons to determine which Block you wish to edit. When you are editing Block parameters, the QuadraVerb 2 remembers which page you were in last for each Block. This makes programming easier since, when you go from one Block to another (which may be of a different effect type with different parameters/pages), you will be back in the same page you left when you return to the previous Block to do more editing.

< Page >

This rocker button allows you to scroll back and forth through the pages indicated under PAGE (maximum of 9) in the display. Sometimes a Page has more than one parameter in it; in this situation, the [< PAGE >] buttons will step through each parameter field separately before moving on to the next page.
Use the [TYPE] button to define the type of effect in the selected Block. Once a Block has been chosen and the [TYPE] button is pressed, we can dial through with the [VALUE/ENTER] knob to choose the function of that Block from EQUALIZATION, PITCH, DELAY, REVERBERATION or OFF. Once the general function of a Block has been selected by pressing the [VALUE/ENTER] button, the display will automatically advance to the second page of the Type function where we can define the specific effect of the Block. Example: If it is a Reverberation Block, you can select Hall 1, Plate 1, Non Linear, etc., using the [VALUE/ENTER] knob.
Another page is included in Type mode which allows you to move a defined Block to another position. If you defined Block #1 as a Delay, and later decide to first have the input signal routed through an EQ, you can move the Delay Block to make room for it. First select the Block to be moved, press [PAGE >] to advance the cursor to the next field, and select the Block # you want to move it to. Then to execute the move, press the [VALUE/ENTER] button. The Block is moved and the routings repatched to recreate the same signal path. Now you can redefine Block #1 as an EQ. If you move a Block to a position already occupied by another Block, the two Blocks will swap positions, and their routings will automatically be swapped as well to maintain the identical signal path. Selection Defined Blocks Parameter Block Function Effect Type Move Block Block Function Move Block Page # 2

DIG CH IN: L=1,R=2 OUT: L=1,R=2
Page 7: Digital Output Mode. This determines how the DIGITAL [OUT] connector will function. When set to NORMAL, the QuadraVerb 2s LR OUT is routed to the DIGITAL [OUT] connector. When set to THRU, whatever is received at the DIGITAL [IN] connector is passed on to the DIGITAL [OUT] connector without any processing occurring on the digital signal within the QuadraVerb 2. Use this mode when you are connected between to Alesis Optical devices (such as ADAT) between which you wish to bounce digital audio.
DIGITAL OUTPUT MODE: NORMAL
Page 8: Tap Tempo Footswitch. This lets you choose which footswitch jack (either [ADVANCE] or [BYPASS]) will be used to provide a tap tempo source for setting delay time, provided the selected Program uses one of the two available tap tempo delay types. This requires that you have defined an Effect Block as one of the two Tap Tempo delay types, and that the desired footswitch jack has been selected for controlling tap tempo. Page 9: Global Direct Signal. The purpose of this feature is to satisfy the conditions of a recording studio environment. When connecting the QuadraVerb 2 to a mixing consoles aux sends and returns, it is generally desirable to remove the direct signal feed from the outputs of the QuadraVerb 2. Since most QuadraVerb 2 Programs route the LR IN signal to the LR OUT, you will need to remove this connection from the Programs routing when connecting to a mixers aux sends and returns. However, this can be done globally for all Programs using this function. If it is set to ON, the inputs will be heard at the outputs, if the are routed this way in the current Program. By setting this function to MUTE, you can remove this connection for all Programs without having to delete the patch cords in each that route the inputs to the outputs.

GLOBAL DIRECT SIGNAL: ON

When set to MUTE, recalling a Program which has the LR IN routed to the LR OUT will not display those patch cords so as to avoid confusion. You can, however, still add or delete these connections, as well as adjust the Direct Signal Level in Mix mode, and these changes will be remembered when you store the edited Program. However, as long as the Global Direct Signal function is set to MUTE, you will not hear the effect of any of these edit.
Selecting this button allows us to name, edit a name or rename a Program. Names can contain up to 14 Characters and are selected by turning the [VALUE/ENTER] knob. The cursor is positioned by using the [< PAGE >] buttons. Or, you can press the [VALUE/ENTER] button to advance the cursor to the right; this helps make naming your Programs a fast operation. Once chosen, the name can be stored along with the Program using the [STORE] button (see above). Here is a chart of available characters: ! 5 I ] q " 6 J ^ r # 7 K _ s $ 8 L ` t % & 9 : M N a b u v ; O c w ( < P d x ) = Q e y * > R f z + ? S g { , -. / 0 @ A B C D T U V W X h i j k l | } 1 E Y m 2 F Z n 3 G [ o

PROGRAM TABLE: 000 = 00 User Turn the [VALUE/ENTER] knob to select a program change number from 000

127 to be re-mapped.

Press [PAGE >] to advance the cursor to the second field in the display.
PROGRAM TABLE: 000 = 00 User D Use the [VALUE/ENTER] knob to select a QuadraVerb 2 Program for the
selected MIDI program change message to be re-mapped to (Preset 0099 or User 0099).

SysEx Storage

To send and receive program information via SysEx dumps using a computer, or some other SysEx storage device (such as the Alesis DataDisk), or another QuadraVerb 2:
Connect the other devices MIDI OUT to the QuadraVerb 2s [MIDI IN].
Connect the QuadraVerb 2s [MIDI OUT] to the other devices MIDI IN. This provides two-way communication between the devices.
Press [< PAGE] to select MIDI Page 6.
SEND MIDI PROGRAM: 00 TO 00 Use the [VALUE/ENTER] knob to select a User Program from 00-99, or the
current Program being used (EDIT), or ALL User Programs. To send all User Programs, turn the [VALUE/ENTER] knob all the way to the right to select ALL. Optionally, when sending a single Program to another QuadraVerb 2, you can choose to send it to a different location. When you select a Program to be sent, the second field (which represents the destination location) is linked and moves along with it. To select a different location number to send this Program to:
Press [PAGE >] and use the [VALUE/ENTER] knob to select a destination location (0099 or EDIT). If you chose to send ALL User Programs, the second field will disappear.
D Set the receiving MIDI device to receive or record the MIDI information about to be
sent from the QuadraVerb 2.
Press the [VALUE/ENTER] button to transmit.
If sending ALL User Programs, during the dump the display will read:
MIDI PROGRAM DUMP IN PROGRESS.
If sending a single Program, the display will not change when the [VALUE/ENTER] button is pressed, since this effectively takes no time at all.
When you send a SysEx dump back to the QuadraVerb 2, it will automatically go
into receive mode (you do not have to do anything special). When this occurs, the display will momentarily read:

RECEIVING MIDI DATA.

If you dont want the Q2 to receive SysEx dumps, go to MIDI Page 5, and set System Exclusive Receive to OFF.

MIDI Thru

QuadraVerb 2 Reference Manual 77
In order to pass on MIDI information from a control device thru the QuadraVerb 2 to another MIDI device:

Peak Follower 1 and 2 have identical features and work as shown below:
SLOPE IS SET BY DECAY TIME

PEAK FOLLOWER OUTPUT

AUDIO PEAK INPUT
Modulation Page 4 allows you to select the type of each Input Generator. The remaining pages in Modulation Mode will appear differently in the display depending on which type of Input Generators you have selected. This may be confusing at times, since both generators could be set to Input Envelope type, or you could have Input Generator 1 set to an Input Envelope type while Input Generator 2 is set to a Peak Follower type. Once you are in Modulation Pages 4 through 7, you can select which of the two Input Generators you want to edit (much the same way you would select a Modulator in Modulation Pages 1 through 3). To select the Input Generators types and edit their parameters:
The [MODULATION] buttons LED will light.
Press [PAGE >] seven times (or until Modulation Page 4 is underlined). The display should look like this:
The cursor appears beneath the Generator, indicating that you may now turn the [VALUE/ENTER] knob and select either Input Generator 1 or 2, depending on which you want to define. In the display example above, Input Generator 1 is defined to be an Input Envelope.
Press the [PAGE >] button to advance the cursor to the next field. Turn the [VALUE/ENTER] knob to select either Input Envelope or Peak Follower
to be the selected Input Generators type.
Press the [PAGE >] button to advance to Modulation Page 5.
If the Generators type is Input Envelope, the display will look like this:
GEN 1 ENV TRIGGER SOURCE: LEFT
If the Generators type is Peak Follower, the display will look like this:
GEN 1 PEAK FOLLOWER SOURCE: LEFT
The cursor appears beneath the Generator, indicating that you may now turn the [VALUE/ENTER] knob and select either Input Generator 1 or 2, depending on which one you want to edit. You may now select what the trigger source of the selected Input Generator will be.
Press [PAGE >] to advance the cursor to the next field, and turn the [VALUE/ENTER] knob to set the selected Input Generators trigger source to either LEFT, RIGHT or L&R (both inputs).
D Press [PAGE >] to advance to Modulation Page 6.
If the selected Input Generators type is Input Envelope, the display will look like this:

GEN 1 ENV ATK. THRESHOLD: +0dB
If the selected Input Generators type is Peak Follower, the display will look like this:
GEN 1 PEAK FOLLOWER GAIN: x 1
The cursor appears beneath the Generator, indicating that you may now turn the [VALUE/ENTER] knob and select either Input Generator 1 or 2, depending on which one you want to edit.
Press [PAGE >] to advance the cursor to the next field, and turn the
[VALUE/ENTER] knob to adjust either the Envelope Attack Threshold (-32 to +0dB) or the Peak Followers Gain (x1 to x99).
Press [PAGE >] to advance to page 7.
GEN 1 ENV REL. THRESHOLD: +0dB
GEN 1 PEAK FOLW. DECAY: 0.20Sec
Again the cursor appears beneath the Generator, indicating that you may now turn the [VALUE/ENTER] knob and select either Input Generator 1 or 2, depending on which one you want to edit. Press [PAGE >] to advance the cursor to the next field, and turn the [VALUE/ENTER] knob to adjust either the Envelope Release Threshold (-50 to +0dB) or the Peak Followers Decay Time (from 0.20 to 10.00 seconds).
If the selected Input Generators type is input envelope:
Press [PAGE>] to advance to Page 8.
GEN 1 ENV ATTACK TIME: 0.00Sec
PRESS [PAGE>} to advance the cursor to the next field and turn the [VALUE/ENTER] knob to adjust the input envelopes attack time (0.00 to 10.00 seconds). This controls the rate that the envelopes control will affect the selected target parameter once it has crossed the attack threshold. Press [PAGE>] to advance to Page 9. If the selected Input Generator's type is Input Envelope, the display will look like this:
GEN 1 ENV RELEASE TIME: 0.00Sec
Press [PAGE>] to advance the cursor to the next field, and turn the [VALUE/ENTER] knob to adjust the input envelope's release time (0.00 to 10.00 seconds). This controls the rate that the envelope's value will fall after the source level has crossed the release threshold.

Footswitch Controls

Two footswitch jacks, [ADVANCE] and [BYPASS], are provided on the back panel of the QuadraVerb 2.

Program Advance

The [ADVANCE] jack allows the QuadraVerb 2s Programs to be advanced remotely from a footswitch. The Program numbers included can be selected by setting the Footswitch Range, found on Global Page 2. The range can be as small or large as you like, including either the Preset or User banks or both. Example: If the Footswitch Range is from Preset 89 to User 14, the Programs will continuously cycle from Preset 89 to User 14 whenever the Advance footswitch is triggered. To set the Footswitch Range:

Press [PAGE >] 5 times, so that Page 5 is underlined in the display. The display will read:
If the Input Audio Source is set to Optical Data, then the Sample Clock Source will be set to Optical and cannot be changed.
Turn the [VALUE/ENTER] knob to select either INTERNAL or 48 kHz IN.

48 kHz In

Optical In Sync Out

Optical Out

48 kHz Out

ADAT #3

Optical In Sync Out Sync In
(See AI-1 Manual for details)

To the AI-1

If you wish to route the digital output to a device that uses AES/EBU or S/PDIF standards, you can connect the QuadraVerb 2 to the Alesis AI-1. This can be done directly, by connecting the QuadraVerb 2s [DIGITAL OUT] to the AI-1s DIGITAL IN and the QuadraVerb 2s [DIGITAL IN] connected to the AI-1s DIGITAL OUT. Alternatively, if you are using multiple ADATs and the BRC (as described above), you can simply insert the AI-1 into the fiber optic chain, either before or after the QuadraVerb 2. In the BRC/ADAT system illustration above, the AI-1 is inserted between the last ADAT in the chain and the QuadraVerb 2. In this scenario, you can route the QuadraVerb 2s digital output to any ADAT in the chain, or the AI-1 (for routing to another digital audio peripheral using either AES/EBU or S/PDIF standards). You can also route audio to the digital inputs of the QuadraVerb 2 coming from any ADAT in the chain or the AI-1 (for processing digital audio from some other digital audio peripheral). More information about digital audio routing can be found in the next section.

From the QuadraSynth

The Alesis QuadraSynth and S4 sound module both have Alesis Optical digital outputs. These devices provide their four analog audio outputs on the first four channels of the 8 channel digital buss. Simply connect a single fiber optic cable between the QuadraSynths DIGITAL OUT connector and the QuadraVerb 2s [DIGITAL IN] connector. If the ADATs are being controlled by a BRC or AI-2, the QuadraSynth's clock must be controlled by the 48 kHz OUT of the BRC or AI-2. Connect a BNC cable from the BRC or AI-2 to the QuadraSynth's 48 kHz IN jack.

Routings

To specific ADAT tracks

DSP IS FULL

This means there is not enough processing power available to create the additional effect. But there may be enough available to add an EQ, two pitch effects and two delays (or some other combination). If you have created four pitch Blocks and you try to create a fifth, the following message will appear:

OUT OF LFOS

This means that there are no more available LFOs (low frequency oscillators), which are required by all pitch effects. However, the larger reverb effects (Plate 2, Room 2, Chamber 2 and Hall 2) use 1 LFO each. This means if you had three Pitch Blocks and a reverb Block using one of the larger reverbs, you would not be able to add a fourth Pitch Block. Also, the Pitch type Mono Lezlie uses two LFOs, which means that when using it you will only have two LFOs available. While the QuadraVerb 2 has a custom DSP chip that processes all the effects, some of the effects available require that the main microprocessor assist in handling some of this responsibility. On occasion, you may be using enough effects simultaneously that no more processing power is available from the main microprocessor; example: when you try to create more than three Multi Tap Delays in a Program. In these cases, the following message will appear:
BLOCK COMBINATION NOT ALLOWED
Finally, if a Delay Block has its delay time to 5 seconds (5,000.0 ms), and you try to create another Delay Block and set its delay time to 460 ms or higher, you will get a Effect Memory is Full message. There is actually 5,455.9 ms of delay memory available. Although you could create 8 Delay Blocks, they all share the available delay memory. Therefore, when setting the delay time of each Delay Block you would only have available the amount of delay memory not being used by the other Delay Blocks. When all memory is being used, the following message will appear:

EFFECT MEMORY IS FULL

Checking the Software Version
The current software version may be determined by holding [GLOBAL] and pressing [PROGRAM]. The display will indicate the currently installed software version.

Re-initializing

To re-initialize the QuadraVerb 2, hold down both [PROGRAM] and [COMPARE] while turning on the power. This will reset all Global parameters to their default settings, and will initialize the edit buffer so that the current Program is set to its default settings (no Blocks/routings). However, none of the Programs in the User bank or the Preset bank are changed when re-initializing the unit this way.

Total Reset

A more drastic version of re-initializing the QuadraVerb 2 will erase all User Programs, as well as resetting all Global parameters. Hold down [PROGRAM], [COMPARE], and [<BLOCK] simultaneously while turning on the power.