TRACK EDIT:

Hold this while pressing a TRACK button to select a track for editing.

PEAK MODE:

REC INDICATORS: These indicate when a track is "armed" for recording (flashing) or in record (solid), as controlled by TRACK BUTTONS 1-24.
These indicate when a track is monitoring its input (indicator ON), as controlled by the AUTO INPUT, ALL INPUT buttons in combination with whether the track is armed. See page 40 for details.

INPUT INDICATORS:

This sets how the meter will display peaks: continuously holding them until PEAK CLEAR is pressed, holding peaks on the meter for a few moments, or not hold them at all. For more about the meters and level setting, see Chapter 3: Basic Recording and Playback.

Drive caddies:

The ADAT HD24 records on removable, affordable IDE hard drives. It comes supplied with a 10gigabyte drive in the DRIVE 1 slot, which gives you 45 minutes of 24track recording time (1080 total track minutes). The DRIVE 2 slot comes with an empty caddy, which you can fill with an IDE drive of any size, from almost any manufacturer (see your Alesis dealer for details). Additional drive caddies are available from your Alesis dealer, so you can instantly swap out projects, just as conveniently as tape.
Use these buttons to select or unmount (power down) a drive. The LED beneath it indicates the state of the drive:

DRIVE 1, DRIVE 2:

If the LED is off, the drive is unmounted (or empty) and may be removed. LED green: the drive is mounted. LED red: the drive is currently being accessed for recording or playback.
To see which drive is selected, look at the icons next to the HD Free Space display. See page 49.

POWER (SOFT):

Once the "hard" POWER switch on the rear panel is ON, push this to turn the unit on and off.
Never pull a drive caddy out unless its LED is off! Doing so could physically damage the drive or corrupt data on it. For more information about drive caddies, see Chapter 5: Working with Drives.
Front panel tourright side

Editing buttons

The EDIT START and EDIT END buttons define a region of a track (or tracks, as determined by the TRACK EDIT button) that can be selected for editing. Press CUT to remove the region (leaving silence on the track), and COPY to copy it without removing it. PASTE pastes the audio that was cut or copied starting at the EDIT IN point, overwriting data on the selected track(s). If you decide the edit you made was a mistake, press UNDO to go back to the way it was.

To synchronize multiple HD24s and/or ADATs:
1. 2. 3. 4. Locate the SYNC IN and SYNC OUT connectors. Connect one end of a male-to-male, 9-pin connector cable to the masters SYNC OUT jack. Connect the other end of the cable to the first slaves SYNC IN jack. For additional slaves, connect one end of a male-to-male, 9-pin D connector cable to the first slaves SYNC OUT jack, and the other end to the second slaves SYNC IN jack. Its SYNC OUT jack then connects to the third slaves SYNC IN jack, and so on.
The moment the SYNC connection is made, the slave machine(s) will automatically switch to external clock and follow transport commands from the master (unless taken offline by dismounting all drives, or ejecting tapes). For more information about using multiple HD24s and/or ADATs, refer to chapter 8. The illustration below depicts an ADAT HD24 being used as the master machine to another HD24 so they can be synchronized together, making a 48track recorder.
ADAT Optical Digital Inputs and Outputs
Each of the digital inputs and outputs of the ADAT HD24 carries eight tracks or channels (up to 48 kHz) on a single fiber optic cable in the industry-standard ADAT Optical format. To cover the 24 tracks of the HD24, there are three sets of inputs and three sets of outputs. Connect these outputs if you want to: copy audio between ADATs within the digital domain connect to a digital mixing console transfer audio to and from a computer workstation with ADAT Optical ports receive digital signals from many Alesis keyboards and effect devices
To transfer audio from the HD24 to non-24-bit systems you have two options:
1. Transmit at 24 bit, and the receiving unit will ignore the bits it can't read, essentially cutting them off. This option provides the lowest noise when tracks are going to be processed and mixed. Connect the machines via analog inputs and outputs. This will effectively dither the 24-bit signal of the HD24 to whatever the receiver is using. While a digital transfer is theoretically best, todays converters are of such high quality that the difference is usually not audible.
Digital copying requires three fiber optic cables for each HD24 in the system (or any other ADATcompatible product). Additional cables are available from your dealer in various lengths up to 16 feet. When connecting a digital mixer, you'll need six cables per HD24 in the system. Digital audio connections can be made while power is on or off. Note: To bounce tracks within a single HD24, it is not necessary to connect the optical network.

ADAT Optical hookups between two HD24s arent usually necessaryits faster to simply swap hard drives and make copies in a single machine.
Dont loop the opticals: Unlike tape-based ADATs, the HD24 is not designed to be connected in a digital loop; there is no digital through mode where one HD24 will simply pass along the digital signal at its input. The digital output of each HD24 simply represents whatever is on that particular machine.
Connecting to a computer interface card
This illustration shows an HD24 connected to an ADAT-compatible computer interface card. The cards ADAT outputs are connected to the HD24 Digital Inputs and the HD24s Digital Outputs are connected to the cards ADAT Inputs. In this particular case the ADAT SYNC is connected so that the card (computer) is the master or controller of the ADAT HD24. Check with the manual for your computer interface for complete instructions.

Footswitches

The HD24 provides two footswitch connectors on its rear panel using 1/4" mono (T/S) jacks. One, labeled LRC , allows locate and play commands when used with a standard footswitch, or more elaborate control when used with the LRC Remote control; the other, labeled PUNCH, is for punch in/out control. The two footswitch jack functions are designed to be used with any momentary single-pole/singlethrow footswitch (either normally open or normally closed*). These should be plugged in prior to power-up so that the HD24 can configure itself for the type of footswitch being used.

The LRC Remote

You can connect the compact LRC HD24 remote control unit to the LRC jack only to provide remote access of transport functions. Using the punch jack for an LRC does not work on the HD24. An ADAT LRC can also be used, but double-check the labeling of the buttons as these have changed for the HD24. The Punch In/Out footswitch and HD24 Remote both work in conjunction with the Rehearse and Auto Record features. See Chapter 4, "Using Locate Points".
When using a normally open footswitch, the footswitch can be plugged in without restarting the HD24 (powering down and powering up). However, if using a normally closed footswitch, the HD24 should be restarted after plugging it in. Dont step on the footswitch while the HD24 is being powered on, or the switch will operate backwards.

chapter 3

If a record is initiated past Locate 21s position, but before Locate 22s position, then record is entered immediately. If the record is initiated after Locate 22s position, then the record command is ignored and the HD24 will continue in play mode.

Rehearsing

By pressing the REHEARSE button (the REHEARSE icon will light in the display), you can run through the Auto-Record process without actually recording anything. However, if the AUTO INPUT function is turned on, the input monitors on the tracks that enabled for recording will switch from playback to input when the punch-in occurs, and back to playback when the punch-out occurs. The RECORD LED will continue flashing throughout the punch in and out. This way you can try out your punch locations first without recording over anything. In other words, you can measure twice (or more), and cut only once! Tip: Press the Rehearse button, arm a track, then punch in and out of record, storing new values in Locates 21 and 22, to quickly set Punch In and Punch Out points for Auto Recording.

chapter 5

Working with Drives
Mounting and selecting a drive
One of the key strengths of the ADAT HD24 is its easily-removable hard drives; in fact it was our goal to make the drive caddies similar to ADAT tapes in their transportability and low cost. Your system becomes much more flexible when you add additional drives. Without shutting down your system, you can simply insert a drive and play or record on it. You don't have to wait for a download or a backupit's available just as if it were a tape. But there are certain drive modes you need to understand: when and how a drive is mounted and unmounted, and when it is selected. Each of the two hard disk drive bays has an associated DRIVE button that performs two major functions: selecting the drive for use, and preparing the drive for removal from the machine (dismounting and power-down). Associated with each drive select button is a two-color LED that indicates the status of the hard drive. When this LED is lit (either green or flashing red), the drive is mounted. Mounting means that the system recognizes the disk, has powered it up, and can communicate with it. What happens when a drive mounts When a drive gets mounted, if the drive contains a valid ADAT FST format, the machine will automatically enter Song Select mode and attempt to select the most recently selected Song, or Song 01. If there are no songs on the disk, the display will indicate "No Songs On Disk"but all you have to do is press the NEW SONG button and you're ready to record. If the drive is not recognized as having the ADAT FST format, the display will show "Invalid Format", and you'll have to initialize the disk (after making sure there's nothing valuable in some other format on the disk). Which drive is selected? When you have hard disks mounted in both drives, remember that just because a drive is mounted and its LED is green doesn't mean the HD24 is actively using it at any given moment. Only one drive can be active or selected at any given timeyou can't record or play back audio on two different drives simultaneously. The indicator for which drive is the currentlyselected drive is in the upper right hand corner of the display: HD FREE SPACE Before you can pull out a drive, it must be dismounted (DRIVE LED must be OFF). Otherwise, you run the risk of a head crash and losing data. 2

In this display, Drive 2 is the active drive, and there are 34 minutes of free space at the current sample rate and track width. The HD FREE SPACE indicator shows available recording time in hours, minutes, or seconds, as indicated by an H, M, or S to the right of the number.
working with drives chapter 5

How Drives Get Mounted

When power is turned on and a drive is present, it will be mounted automatically; you don't need to take any action unless a drive was deliberately dismounted. If no drive is present If the ADAT HD24 is powered on with no drives in its bays, the display will (after the startup "splash" screen) show the following message: No Disk Drive Selected When a drive caddy is inserted If you push a caddy into the first drive bay, the machine will automatically detect that the drive is there, will apply power and try to mount the drive. If the ADAT HD24 already has one active selected drive in one bay and a drive is inserted in the other bay, the machine will not attempt to apply power and mount the drive until after that drive's respective DRIVE button is pressed. If a drive is present If the ADAT HD24 is powered on with one drive in its bay, the machine will automatically detect that the drive is there and will apply power and try to mount the drive. If it is powered on with two drives in its bays, the machine will automatically detect that both drives are there but will only apply power and try to mount the drive that was being used before the HD24 was turned off.

Dismounting drives

Before you can pull out a drive and replace it with another one, it must be dismounted (DRIVE LED must be OFF). Otherwise, you run the risk of a head crash and losing data.

To dismount a drive:

1. Press the DRIVE button. The display will Drive? Y/N". 2. 3. read "Dismount
Press the YES (L) button. Wait while the drive is powered off and the heads are parked. The display will read " Dismount HD 1." with a progress bar on the bottom line and the DRIVE LED will flash red.
When the display is clear and the DRIVE LED is completely off, you may pull out the drive by pulling on the handle.
If there are no other drives in the machine after a drive dismount procedure, the display will show the following message: No Disk Drive Selected
Tip: If there are two mounted drives in the bays, and Drive 1 is the selected drive, press and hold the DRIVE 2 button for two seconds to dismount Drive 2 without first selecting it for use. The same logic holds for Drive 1.

editing chapter 6

Using the Edit Start and Edit End Points
Setting accurate EDIT START and EDIT END points will be critical to every edit you make on the HD24. This section will explain how to make the most of these functions.
previewing your Edit Start location, the display will read: Previewing Edit Start 3. Press the Edit End button. The display should look like something like this: L24: "Edit Out" 00:00:55:10.04 This example display shows that the Edit End point (Locate Point #24) occurs at 0 hours, 0 minutes, 55 seconds, 10 frames and 4 subframes into the song. 4. Press the EDIT END button again. You should hear the song begin to play from 5 seconds before the Edit End location, then stop at the Edit End point. While the HD24 is previewing your Edit Start location, the display will read: Previewing Edit End 5. To preview the entire edit region, from Edit Start to Edit End, press the EDIT START and EDIT END buttons simultaneously. The HD24 will play from the Edit Start point to the Edit End point, and the display will read: Previewing Edit Region You can press STOP at any time to stop playback of a preview.
Setting an Edit Start or Edit End Point
Edit Start and Edit End points will be used for every type of edit. This section will explain how to set an Edit Start or Edit End point on the fly. 1. 2. First, record some audio into a song so you can hear what youre editing. Press PLAY. (You can also set an Edit Start point while stopped, but this method allows you to hear what youre doing.) Press and hold the SET LOCATE button. When you reach the point where you want a Cut, Copy or Paste to occur, press EDIT START. Setting an Edit End point uses the same procedure, only you press EDIT END when you reach the location where a Cut or Copy should end.
Previewing the Edit Start and Edit End Points
The ADAT HD24 offers a convenient, automatic way to hear the edit points which you just marked. During a preview, youll only hear tracks that have been selected for editing using the TRACK EDIT key (or, if no tracks are selected, youll hear all tracks). 1. Press the EDIT START button. The display should look like something like this: L23: "Edit In " 00:00:52:17.54 This example display shows that the Edit Start point (Locate Point #23) occurs at 0 hours, 0 minutes, 52 seconds, 17 frames and 54 subframes into the song. 2. Press the EDIT START button again. You should hear the song begin to play from the point where you set the Edit Start point, then continue for 5 seconds after. While the HD24 is

The Edit Buffer and Levels of Undo
The ADAT HD24 uses a special area of the hard disk to store data used for editing operations. This edit buffer can save a copy of any original audio that will be destroyed by an edit operation, as well as the edit data itself. This prereserved edit buffer holds up to 72 track-minutes of 48 kHz data (3 minutes of 24 tracks). These track minutes are NOT part of the free space on the disk used for recording; theyre always available even if you have no HD Free Space left. In most practical applications, this space is more than enough to undo a bunch of previous edits if you decide youve made some mistakes. We say up to 99 levels of Undo because this edit buffer is revolvingit tries to save as many previous edits as possible, but starts erasing old edits if it needs space for new ones, without warning. Luckily, in most cases edits are performed on only a few tracks, and are 10-20 seconds long. Usually, youll be able to UNDO back through several generations of editing (most likely, more than youll remember!). A feature called paste undo on/off allows you to get more mileage out of the buffer. At its most extreme, if you cut 90 seconds across all 24 tracks, and pasted it in a different location, youd have only one level of Undo: half the buffer is used for the cut data, and half for the data being pasted over. In this case, the HD24 would have to delete all the old UNDOs in the stack to get the space to perform the paste. If Paste Undo was set to off, half of the buffer (36 track-minutes) and some previous UNDOs would still be availablebut youd better be sure youre pasting over track segments you dont want!
The following actions will also erase the edit buffer: Selecting a different drive Turning off the unit Changing to a different Song (except the last CUT or COPY will be preserved, so you can paste between songs).

Using the Undo command

First, perform a Copy, Cut or Paste command. Press the UNDO button. If your last operation was a Paste command, the display would read: Undo Last Track Paste? Y/N Press the YES (L) button. The display should read: Undo Track Paste Are You Sure?Y/N Press the YES (L) button. You will see a progress bar on the display, then it will read: Undo Complete

Track Slip

The Track Slip function is similar to the Track Delay function in tape-based ADAT recorders. Using Track Slip, however, audio can be delayed or advanced in time up to 170 milliseconds (0.17 seconds). The Track Slip function can only be applied to entire tracks at once, not to a region. Edit Start and Edit End points do not affect this function. Turn Track Slip off before attempting to record. Track Slip can be used only during playback, not during recording.

Using Track Slip

Press the TRACK SLIP button. The display should read: Track Slip OFF Track01> 000.0ms Press the < (CURSOR LEFT) button until you have selected the word OFF. Change this to ON by pressing YES (L). This setting allows you to toggle Track Slip off without losing the settings of your individual tracks. 2. 3. Press the > (CURSOR RIGHT) button to select the Track Number field. Press the YES (L) or NO (M) buttons to select the track you wish to Slip. Track Slip OFF Track05> 000.0ms Press the > (CURSOR RIGHT) button to select the time field. Pressing the YES ( L) or N O (M) buttons will change the Track Slip time in milliseconds. Press the > (CURSOR RIGHT) button again to edit the Track Slip time in 1/10ths of a millisecond. Press both the YES (L ) and N O (M) buttons simultaneously to return the Track Slip time to 000.0ms.

Using the HD24 with the M20
The M20 and its remote control, the CADI, have the most advanced synchronization capabilities of any ADAT product. The M20 is designed to meet the needs of video and film post production, including SMPTE synchronization at 44.1 and 48 kHz sampling rates including pull-up and pull-down for film transfer capabilities. Although the M20 has a much faster transport than other ADATs, it still needs to be the master of the HD24 for reasons already covered. Note the following if you slave an HD24 to an M20 system: Jog/shuttle wheel: When you turn the jog wheel on the M20 or CADI the HD24 will not respond until a locate command is received via the Sync In. It will not scrub, although the M20 will (if an Aux track has been created). Individual track input mode: Only the M20 can place individual tracks into input mode while leaving the rest untouched. Pressing the white track input keys on a CADI that correspond to HD24 tracks will have no effect. No ALL SAFE: Pressing ALL SAFE on the CADI will NOT take tracks on the HD24 out of record-ready mode. 88.2/96k sampling rates: The M20/CADI cannot synchronize an HD24 that is using the high sampling rates. Force Master: It is possible to have no tape in the M20 and leave it offline, using it only as a synchronizer for the HD24. See the M20 documentation for information on the force master feature.

chapter 9

Using Ethernet
When you'd use Ethernet and the HD24
Ethernet is a method for connecting multiple computers and peripherals (such as printers and disk arrays) in a network. Most offices tie their computers together in a network so they can share files and software between them, and all print to a central, shared printer. This is referred to as a Local Area Network, or LAN. The largest network of all is the Internet. When a computer is connected to the Internet (either by a telephone modem or through its local network) it can contact and share files with millions of other computers worldwide. The ADAT HD24 uses Ethernet technology to share its audio files with either a single computer, a computer network, or even the Internet. Since this technology is widely available and inexpensive, almost every currently-available computer can connect to the HD24 with a minimum of hassle.

Limitations

Note that using the HD24 as a network appliance is different from attaching it to other ADATs or a computer card such as the ADAT/EDIT system via the SYNC and OPTICAL jacks. When the HD24 is in FTP Server Mode, it cannot record or play back audio; it's busy being a network server instead of being a multitrack audio recorder. Ethernet is not the fastest way to transfer audio. For example, even with a direct connection and fast software, it may take 16 minutes to transfer a 4-minute, 24-track song. If you're transferring over the Internet, it may take much longer, depending upon the speed of your connection and network demands. So, if speed is a concern, using the Optical ports is faster. If you have several HD24s in different rooms of a studio, transferring audio by simply pulling out the hard drive caddy and copying the disk is even faster than that. Having said that, once you have the connection set up and know how to use it, transfers can take place without your having to be present, while you're not using your studio. If you share tracks with a studio in another city, you can leave the ADAT HD24 in FTP server mode overnight while the other studio uploads or downloads.

In most cases this setting should be left as shown above. In large networks, it may be changed to 255.255.0.0. (Only under very specialized circumstances will any number be anything except a 255 or a zero.)
Press the UTILITY button again to display the next page: Util08:Gateway 000.000.000.000
Later well explain how to set the IP address of your computer to 192.168.001.001 so it can communicate with this address. But as a quick reference, here are the settings for both the HD24 and your computer that we recommend unless youre on a more complicated network: HD24 IP Address: 192.168.1.100 HD24 Subnet Mask: 255.255.255.0 HD24 Gateway: 0.0.0.0 PC IP Address: 192.168.1.1 PC Subnet Mask: 255.255.255.0
In most cases this setting should be left as shown above. If you intend to use your HD24 on the Internet, you will need to set this address. Please consult your network administrator or Internet Service Provider.
To set the HD24's password:
1. Press the UTILITY button until the display reads: Util09:FTP Login User:"anonymous"
About setting up your computer
Once the HD24's IP address has been set up, the computer needs to be set to a related address on the network and configured to use Ethernet and TCP/IP as its communication standard. Doing this is different for the two major types of operating system: the Microsoft Windows OS used by (mostly) Intel-based PCs, and the Apple Macintosh OS. While these instructions may seem complex, in most cases you'll only have to do this once, and then you'll be set.
If you want to enter a user name, use the arrow keys under the display to place the cursor under the letter you want to change. Then press the YES (L) or NO (M) keys to change the letter. If not, remember to enter "anonymous" as your user name when the computer asks you for one.

A word of caution

These instructions cover the most common system configurations. It's impossible to cover every possible combination of software and computer in this manual. There are dozens of preference files, communication settings, etc. that may make things a little different from what we describe. If you run into difficulties or something that isn't covered in the rest of this chapter, take a note of every screen message and setting if they're different from what's shown. More information regarding networking with your HD24 will be available in the support/FAQ area at www.alesis.com. To learn more about general networking issues, open the manual for your computer, and check web sites such as: The World of Windows Networking http://www.wown.com And finally, nothing works as well as consulting with someone familiar with networking and your computer's operating system. If you have an Apple Macintosh computer, turn to the next page. If you have a Windows-based PC, skip ahead to page 80.
To enter a password, use the arrow keys to place the cursor under the word "User" in the display. Then press the YES (L) key. The display will show: Util09:FTP Login Pass:" " Make sure you remember this password for future reference.

Use the cursor keys to enter a password up to nine characters long.
Place the HD24 into FTP server mode:
1. Press the UTILITY button until you see the display: Util05:FTP Serv Enable FTP? Y/N
Press the YES (L) key. The display will show "FTP Server Init" briefly, then show "FTP Server Ready".
The ADAT HD24 is now ready to share files with other devices on the network. See page 88 for instructions for quitting FTP Server mode.
Apple Macintosh configuration instructions
The Apple Macintosh was designed from the outset to be networked. Most current Macintosh models have Ethernet ports built right in; you don't need to purchase additional hardware unless you want to have several devices on your Ethernet (AppleTalk) network.
Setting up the AppleTalk, TCP/IP and Remote Access control panels
Next, you have to set up your Macintosh so it knows what language to speak to the ADAT HD24. This involves changing several Control Panel settings within your Macintosh. Make a note of all these settings before you change them, so you can go back to the way things were to use your system as it was previously. Otherwise, you may find that you're unable to use your printer, or get online to the Internet. Better yet, use the Location Manager extension to make a copy of all these settings so you can easily switch between the mode you use normally, and the mode you use when exchanging files with the HD24. In the Apple menu, select Control Panels/Location Manager. In the File menu, select Duplicate Location (assuming you've already set up your current location), then rename it as something like "ADAT Transfer". Set the "Current Location" to that, and follow the following instructions to set AppleTalk properly.
Make Ethernet connections to your computer and HD24 only when the power is off to avoid damage. Read the instructions that came with your computer regarding Ethernet connections and operation. Alesis is not responsible for damage to hardware or software caused by improper connection or operation.

Connection

With the Macintosh (or hub, if applicable) completely shut down, connect either a crossover cable (if you're connecting an HD24 to a single Macintosh) or a regular cable between the ETHERNET jack on the HD24's rear panel, and the Ethernet jack on the back of the Macintosh (noted with a "<>" symbol). When the connection is properly made and the computer and HD24 are powered up, a green LED should light next to the ETHERNET jack on the HD24's rear panel. Once data is being transferred, a yellow LED will flash there as well.

chapter 10

Troubleshooting

Troubleshooting Index

If you experience problems while operating your ADAT HD24, please use the following table to locate possible causes and solutions before contacting Alesis Product Support for assistance. Symptom No audio from outputs Cause No input audio Bad cables Destination is turned down Solution Test with a known good input. Replace the cables. Check the connections and the level of the mixer or amp that the ADAT HD24 is connected to. Copy all tracks, and paste into a new song defined as having more tracks.
No audio input or output on certain channels
Track width is restricted (i.e., when the Song is defined as a 12-track song, there is no output from tracks 13-24) Trying to record onto a track higher than the current Song allows INPUT SELECT is set to 2, 4, 8 or 12- input mode EDIT PREVIEW plays back only tracks selected for editing Power is not connected Rear panel power switch is off Blown fuse

No power

No power (STOP LED won't go on when rear panel power switch is on). Buzz from outputs
Cables are crossing a power cable
Bad cables Problem with the source
Copy all tracks, and paste into a new song defined as having more tracks. Reset INPUT SELECT for 24 input mode To hear all tracks, deselect any tracks armed for editing using TRACK EDIT. Time for a coffee break. Turn it on; (STOP LED will always remain lit) Correct any problem that may have caused the fuse to blow, and replace the fuse with the proper type. Make sure that the ADAT HD24 and its audio cables are kept away from power cables, other power transformers and wall warts. Replace the cable with a new, high-quality cable. Try bypassing the ADAT HD24 by connecting the input cables to the output cables and see if the problem remains.
troubleshooting chapter 10
Symptom Drive will not mount
Cause Empty caddy Drive improperly inserted Foreign material in drive socket Drive is in slave mode
Blips are heard at the edit points after pasting audio AC hum
Drive file system was corrupted by installing the drive in a computer Connectors in caddy loose Several PASTE operations at the same points Noise induced in unbalanced lines Ground differences traveling through cables Song is initialized at 88.2 or 96 k sample rate Errors on hard drive
Cannot select ANALOG input Song shows incorrect data on screen HD24 will not synchronize to SYNC IN Cannot find any spoon

Song is less than 10 seconds long There is no spoon
Solution Install an IDE drive in the caddy Remove the drive and reinsert, firmly pushing on the edges of the handle Power down unit, and try caddy in other drive bay Remove drive from caddy and change jumper from slave to master or single mode Use Utility 3 to scan disk for errors and recover data Open the drive caddy and re-attach connectors Use PASTE UNDO when doing repetitive editing. See page 64. Use only balanced connections in the studio Place all equipment in the studio on a common ground (see next page) Obtain 96k Analog board to record at high rates, or use a 44.1/48k song. Use Utility 3 to scan disk for errors and recover data Record at least 10 seconds in a song before synchronizing
chapter 10 troubleshooting
Avoiding ground loop noise
In todays studio, where it seems every piece of equipment has its own computer chip inside, there are many opportunities for ground loop problems to occur. These show up as hums, buzzes or sometimes radio reception and can occur if a piece of equipment sees two or more different paths to ground. While there are methods to virtually eliminate ground loops and stray radio frequency interference, most of the professional methods are expensive and involve installing a separate power source just for the sound system. Alternatively, here are some helpful hints that professional studio installers use to keep those stray hums and buzzes to a minimum. KEEP ALL ELECTRONICS OF THE SOUND SYSTEM ON THE SAME AC ELECTRICAL CIRCUIT. Most stray hums and buzzes happen as a result of different parts of the sound system being plugged into outlets of different AC circuits. If any noise generating devices such as air conditioners, refrigerators, neon lights, etc., are already plugged into one of these circuits, you then have a perfect condition for stray buzzes. Since most electronic devices of a sound system dont require a lot of current (except for power amplifiers), its usually safe to run a multi-outlet box or two from a SINGLE wall outlet and plug in all of the components of your system there. KEEP AUDIO WIRING AS FAR AWAY FROM AC WIRING AS POSSIBLE. Many hums come from audio cabling being too near AC wiring. If a hum occurs, try moving the audio wiring around to see if the hum ceases or diminishes. If its not possible to separate the audio and AC wiring in some instances, make sure that the audio wires dont run parallel to any AC wire (they should only cross at right angles, if possible). TO ELIMINATE HUM IF THE ABOVE HAS FAILED: A) Disconnect the power from all outboard devices and tape machines except for the ADAT HD24, the mixer and control room monitor power amp. B) Plug in each tape machine and outboard effects device one at a time. If possible, flip the polarity of the plug of each device (turn it

Macintosh, 77 Maintenance, 94 media cost chart, 5 meters, 36, 37 MIDI, 68 MIDI time code, 43, 68 Mixer hookup, 22 Mounting, 49 Name, 33 network, 89 New Song, 13, 32 noise, 93 offset, 70 optical cables, 25 outputs analog, 21 password, 76 PASTE, 15, 55, 60 between songs, 61 PASTE UNDO, 64 Peak Clear, 37 PEAK MODE, 38 Pitch, 42 PLAY, 35 play, 41 Power, 20 Power cable, 7 Power switch, 17 Pre-Roll and Post-Roll, 71 punching in, 35 rack mounting, 19 RECORD, 35 RECORD ENABLE buttons, 36 Recording, 35 recording level, 38 recording time, 51 at high sample rates, 65 REW, 35 Router, 89 Safety, 7 sample rate, 32, 33, 35 and location points, 43 compatibility in PASTE operations, 61 compatibility w. BRC, 71 high (88.2 & 96 kHz), 65
index scan, 41 scrub, 35 for edit points, 57 scrubbing, 41, 69 from M20/CADI, 72 selecting drives, 49 SET LOCATE, 44, 55 shock, 7 slave, 69 SMPTE time code, 70, 72 Snakes, 21 software updating code, 68 SONG SEL, 32 Songs, 31 Specifications, 97 STOP, 35 SYNC, 24 synchronization, 70 by redefining Locate 0, 34 TIME counter, 34 Track Delay, 71 Track Edit, 55, 58, 59 Track Slip, 63 tracks setting number of, 32 transport, 34 UNDO, 15, 55, 62 user name, 76 Utility, 63 Voltage conversion, 20 WAV files, 73 Windows, 80 WORD CLOCK IN, 17 WORD IN jack, 39 XLR to TRS adapter, 21

Alesis Limited Warranty

ALESIS CORPORATION ("ALESIS") warrants this product to be free of defects in material and workmanship for a period of one (1) year for parts and for a period of one (1) year for labor from the date of original retail purchase. This warranty is enforceable only by the original retail purchaser and cannot be transferred or assigned. The purchaser should complete and return the enclosed warranty card within 14 days of purchase. During the warranty period ALESIS shall, at its sole and absolute option, either repair or replace free of charge any product that proves to be defective on inspection by ALESIS or its authorized service representative. In all cases disputes concerning this warranty shall be resolved as prescribed by law. To obtain warranty service, the purchaser must first call or write ALESIS at the address and telephone number printed below to obtain a Return Authorization Number and instructions concerning where to return the unit for service. All inquiries must be accompanied by a description of the problem. All authorized returns must be sent to ALESIS or an authorized ALESIS repair facility postage prepaid, insured and properly packaged. Proof of purchase must be presented in the form of a bill of sale, canceled check or some other positive proof that the product is within the warranty period. ALESIS reserves the right to update any unit returned for repair. ALESIS reserves the right to change or improve design of the product at any time without prior notice. This warranty does not cover claims for damage due to abuse, neglect, alteration or attempted repair by unauthorized personnel, and is limited to failures arising during normal use that are due to defects in material or workmanship in the product. THE ABOVE WARRANTIES ARE IN LIEU OF ANY OTHER WARRANTIES OR REPRESENTATIONS WHETHER EXPRESS OR IMPLIED OR OTHERWISE, WITH RESPECT TO THE PRODUCT, AND SPECIFICALLY EXCLUDE ANY IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY OR OTHER IMPLIED WARRANTIES. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. IN NO EVENT WILL ALESIS BE LIABLE FOR INCIDENTAL, CONSEQUENTIAL, INDIRECT OR OTHER DAMAGES RESULTING FROM THE BREACH OF ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING, AMONG OTHER THINGS, DAMAGE TO PROPERTY, DAMAGE BASED ON INCONVENIENCE OR ON LOSS OF USE OF THE PRODUCT, AND, TO THE EXTENT PERMITTED BY LAW, DAMAGES FOR PERSONAL INJURY. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. THIS CONTRACT SHALL BE GOVERNED BY THE INTERNAL LAWS OF THE STATE OF CALIFORNIA WITHOUT REFERENCE TO CONFLICTS OF LAWS. This warranty gives you specific legal rights, and you may also have other rights required by law which vary from state to state. This warranty only applies to products sold to purchasers in the United States of America or Canada. The terms of this warranty and any obligations of Alesis under this warranty shall apply only within the country of sale. Without limiting the foregoing, repairs under this warranty shall be made only by a duly authorized Alesis service representative in the country of sale. For warranty information in all other countries please refer to your local distributor.

Alesis ADAT-HD24

After powering up:

Set Input to Digital (use Input Select button) Set Clock Source to Optical (use Clock Source button) Press New Song to create a new project Press Yes / button to create Sample Rate should be set to 44.1k (use / keys to change) Press New Song button to set sample rate In all circumstances, choose 24 for Number of Tracks Press New Song button to set Number of Tracks
In Gusman, repeat this procedure on the slave (bottom) multitrack deck. Always use both decks in Gusman (always arm 47-48, ready to record wireless channels).

In Gusman Only:

On the slave (bottom) deck, arm one or more tracks (for this step, it doesnt matter how many) for recording using the Record Enable buttons While holding the Record button, press the Play button Record a few seconds, then stop On the master (top) deck, press the Play button, returning both decks to the same starting location

In both venues:

Arm all tracks to be recorded using the Record Enable buttons When ready to record (using the master (top) deck in Gusman), while holding the Record button, press the Play button Stop when finished, no extra steps needed before powering down

Please note:

In Gusman, dont stop the machines during intermission! Its hard to get the slave started again. (Nothing to worry about in Clarke.)
If you stop recording in Gusman and want to start again:
On the slave (bottom) deck, while holding the Record button, press the Play button Record a few seconds, then stop On the master (top) deck, press the FFWD button, returning both decks to the same location (end of the previous recording) When ready to record, using the master (top) deck in Gusman, while holding the Record button, press the Play button
Note the Song Number in the concert/recital program for the event.