D00735710B

US-122

USB Audio/MIDI Interface

OWNERS MANUAL
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated dangerous voltage within the products enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.
This appliance has a serial number located on the rear panel. Please record the model number and serial number and retain them for your records. Model number Serial number
WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
Important Safety Instructions
Read these instructions. Keep these instructions. Heed all warnings. Follow all instructions. Do not use this apparatus near water. Clean only with dry cloth. Do not block any ventilation openings. Install in accordance with the manufacturers instructions. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
10 Protect the power cord from being walked on or
pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus. Only use attachments/accessories specified by the manufacturer. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.
13 Unplug this apparatus during lightning storms or
when unused for long periods of time.

For USA

TO THE USER This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: a) Reorient or relocate the receiving antenna. b) Increase the separation between the equipment and receiver. c) Connect the equipment into an outlet on a circuit different to that to which the receiver is connected. Consult the dealer or an experienced radio/TV teccnicioan for help. CAUTION Changes or modifications to this equipment not expressly approved by TEAC CORPORATION for compliance could void the users authority to operate this equipment.

Tuning Your PC. 14 Notes on USB interfacing. 15
4 Hooking up Audio and MIDI to the US-122
Hooking up audio.. 16 Hooking up MIDI. 16 Using Direct Monitoring. 17

9 Technical Support

Troubleshooting (Windows). 29 Tech Support Contacts. 29

Before Contacting Us.30

Troubleshooting FAQ. 31
5 The US-122 Control Panel
Main Page.. 18 Buffer Size Adjustment. 18

Optimizing the USB.19

10 Specifications
Audio specifications. 32 Audio performance.. 33 Other characteristics.. 34 Physical characteristics. 34 Dimensional drawing. 35

The Chromatic Tuner.. 19

6 Interfacing with your Audio Software
Selecting the US-122 as your Audio Device. 20

TASCAM US-122 3

Overview
The US-122 is a USB powered audio/ MIDI interface designed for Digital Audio Workstation (DAW) software applications. Its design incorporates a two-input, two-output 24-bit audio interface with balanced inputs, input inserts, guitar impedance matching, phantom powering, and a 16-channel MIDI interface. Because the US-122 is USB-based, its the ideal companion to any desktop- or laptop-based digital recording setup. And since its as compact, like a laptop, requiring no additional power source, it can be combined with one to create a complete portable digital audio workstation solution.

Features

The input section comprises a 24-bit audio interface, capable of streaming two simultaneous channels of audio into your computer. Inputs include two balanced XLR mic inputs with phantom power capability, two 1/4 balanced line inputs (switchable to high-impedance unbalanced, for direct input of a guitar, bass or other hi-Z source), with TRS inserts on each input channel. Outputs include a pair of unbalanced line outputs on RCA connectors, and a separate headphone output. The US-122 also features MIDI input and output ports, allowing you to send and receive data between your computer and other MIDI-equipped devices.

Whats in the package

The US-122 package contains the following items in addition to the main unit and this manual. When opening the package, please make certain that all the included items are present. If anything is missing, contact the dealer where you purchased it. US-122 main unit USB cable CD-ROM containing drivers (Windows and Mac OS), Cubasis, and documentation CD-ROM containing Gigastudio 24 and sample soundware (for Windows only). Warranty and registration cards for US-122 Registration card for Cubasis TEAC address list

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Copyright and trademarks
This product is designed to help you record and reproduce sound works to which you own the copyright, or where you have obtained permission from the copyright holder or the rightful licensor. Unless you own the copyright, or have obtained the appropriate permission from the copyright holder or the rightful licensor, your unauthorized recording, reproduction or distribution thereof may result in severe criminal penalties under copyright laws and international copyright treaties. If you are uncertain about your rights, contact your legal advisor. Under no circumstances will TEAC Corporation be responsible for the consequences of any illegal copying performed using the US-122. Microsoft, Windows, Windows 98, Windows Me, Windows 2000 and Windows XP are trademarks of Microsoft Corporation. The full name of the product referred to as Windows 98 is Microsoft Windows 98 operating system. Pentium is a registered trademark of Intel Corporation. MIDI is a registered trademark of the Association of Manufacturers of Electronic Instruments (AMEI). Mac and Mac OS are trademarks of Apple Computer All other band or product names are trademarks or registered trademarks are the property of their respective companies or organizations.
Nomenclature used in this manual
The following conventions are used in this manual: Physical controls, indicators and connectors on the US-122 are shown LIKE THIS.
This typeface is used to designate software dialog messages. This typeface is used to designate software menu functions and on-screen controllers.

TASCAM US-122 5

Top Panel
1 LINE OUT level control Controls the level to the RCA outputs.
PHONES level control Controls the
level to the headphones output.
3 USB indicator Indicates a valid USB connection to the host computer when lit. 4 DIRECT switch Enables/disables direct monitoring of the input signals 5 MONO switch Enables/disables mono output from the direct monitoring system.
2 MIDI IN indicator Indicates presence of incoming MIDI data at the MIDI input.
MIDI OUT indicator Indicates transmission of MIDI data from the MIDI output.

6 TASCAM US-122

6 DIRECT MONITOR level
control Adjusts the level of the
direct monitoring signal, when this is enabled.

A PHANTOM switch Switches
+48V power to the microphone inputs to allow powering of condenser microphones.

7 L and R input level

controls Input level adjustment. Rotate clockwise to increase the input level of audio sources.

8 MIC/LINE / GUITAR

switches Switch inputs individually between mic/line level and Hi-Z (guitar) level.
Only use the phantom powering with condenser microphones which need it. Keep this switch in the OFF position with all other kinds of equipment connected to the XLR inputs. To avoid noise and possible damage to equipment, turn down the input LEVEL controls when switching the phantom power on and off. Also note that this setting consumes power. If you are operating the unit with a battery-powered laptop computer, this will reduce the battery life of the computer.
9 SIGNAL indicators Indicate
the presence of an audio signal on the respective channel (specifically, when the input level exceeds -37 dBFS).
OL indicators Indicate an overload of the input level to the respective channel (specifically, a level of -2.5dBFS).

Rear Panel

B C D E F
B USB jack Input for USB connection (USB 1.1) to host computer.
E OUTPUT L/R jacks Unbalanced (RCA) analog audio outputs.
C MIDI OUT MIDI output D MIDI IN MIDI input,
F PHONES jack Standard 1/4" stereo headphone output.

TASCAM US-122 7

Front Panel Descriptions
G MIC IN L and R Balanced XLR
Inputs L and Rfor microphones. 1=Ground, 2=hot, 3=cold
anced when MIC/LINE-GUITAR switch is set to MIC/LINE; unbalanced when set to GUITAR.
H LINE/GUITAR L and R Analog inputs (1/4" TRS jack - tip=hot, ring=cold, sleeve=ground) L and R. Bal-
I INSERT L and R TRS 1/4" jacks (tip=send, ring=return, sleeve=ground) for analog inserts for L and R inputs.

8 TASCAM US-122

System Requirements
PC (Windows) Minimum requirements: Pentium II - 266 MHz (or equivalent) processor running Windows 98 (Second Edition) or Windows Me (Millennium Edition), Windows 2000 or Windows XP, 96MB RAM. which utilize Intel-based chipsets. You can determine your chipset by going into the Device Manager. On the Windows 98 desktop, right click on My Computer, and select Properties. Click on the Device Manager tab, and then click on the plus (+) sign next to Universal Serial Bus Controllers. (see illustration below)

Recommended: Pentium II

300MHz processor with 128MB RAM or better (these requirements are for use with Cubasis VST. Other applications will have different requirements. Consult your applications manufacturer for further information).

Installation

Because the US-122 is a USB device, connection is straightforward. Simply plug the USB cable into the US-122, and the other end into your computer. However, you should not connect the unit before installing the drivers (see below).
Windows machines: Make certain that your computers USB host port is enabled (normally, most standard PC BIOS settings default to enabled, but make certain that it hasnt been turned off in the BIOS).
Also make sure that virus protection is turned off before you install the US-122 drivers.
Handle the enclosed CD-ROM with care. If it becomes dirty or scratched, it will be impossible for a computer to read it, and the software cannot be installed. If the disc becomes unreadable, a charge will be made for its replacement. Do not attempt to play the enclosed CDROM using an audio CD player, as this may cause damage to hearing, as well as to speakers, etc. Use only the enclosed USB cable to connect the US-122 and the computer. Do not use other types of cable for this purpose, as some cables contain resistors. If you attempt to use such a cable, the audio input and output will not work properly, and the sound level will be inaudible or very faint.

10 TASCAM US-122

Installation under Windows
The US-122 drivers are available on the CD as executable installers. Youll find two executable installer files in the Driver folder on the disc, labeled as: US122_Win9x_x_yy.exe (for Windows 98 Second Edition and Me (Millennium Edition)) and as US122_Win2k_x_yy.exe (for Windows 2000 and Windows XP) where x and yy represent the version numbers. Note that we have also included the individual driver files, available from the root level of the CD. However, we recommend using the installers, as they will also locate and uninstall any files pertaining to older versions of the US-122 drivers.
2 Click the Setup button. The
Welcome dialog box will appear.
3 Click the Next button. The driver
files will be installed to your hard drive. In some cases, the Add Hardware Wizard may ask for the file US122WDM.SYS. Should this occur, click Browse and direct it to the path Windows/System32/Drivers. In some cases, the Add Hardware Wizard may ask for your Windows 98 or Windows Me CD-ROM if it is unable to find all the needed system files. We suggest you have it handy.
4 The Setup Complete dialog will
appear. Click Yes, I want to restart my computer, followed by the Finish button. The computer will reboot.
You should also check the TASCAM Web site to determine the latest version of the drivers. If necessary, download and install these latest drivers, following the instructions given here.
5 Connect the US-122 to the computer. The Windows Plug and Play system will notice a new USB device and start the Add New Hardware wizard, which will find the needed files on its own. This will take about 30-60 seconds. The drivers are now installed and the US-122 is ready to operate.

To install under Windows 98SE or Me: Note that the US-122 will run
under Windows 98 SE (Second Edition) or Me (Millennium Edition). Due to its limited USB capabilities, First Edition Win98 is not recommended.
Run the Installer with the US-122 NOT connected to the computer.
1 Double click on the executable file
US122_Win9x_y_zz.exe (where y and zz represent the version num-
If you are running Windows 98SE, you may need to install the appropriate Microsoft Hotfix #Q269601.
ber). The installer will run.

TASCAM US-122 11

To install under Windows 2000 or Windows XP:
The drivers are now installed and the US-122 is ready to operate.
US122_Win2k_x_yy.exe (the US-122
setup icon). The installer will run.
2 Click the Next button. The
When using the US-122 with Windows XP, you may need to run the Windows Update program to install the Windows Messenger Update for Audio/Video to improve the USB audio functionality of the system. This update is listed in the Windows XP update list.
files will be installed to your hard drive.
To install using Windows New Hardware Wizard: 1 Insert the CD-ROM into your computers drive.
You may be prompted by a message informing you that the software you are about to install does not have a digital certificate. Simply click Continue the installation anyway and proceed.
2 Connect the US-122 to the computer. The Windows Plug and Play system will notice a new USB device and start the Add New Hardware wizard.
4 If you are prompted to restart your

computer, do so.

3 Choose Search for a suitable driver
for my device and press Next.
5 Connect the US-122 to the computer. The Windows Plug and Play system will notice a new USB device and start the Add New Hardware wizard, which will find the three needed files on its own.
4 Enter the path where the drivers
are stored (that is, the CD-ROM) and press OK.
5 After Windows finds the firmware download driver, click Next.
6 When prompted, select the Install
the software automatically option,
6 Click Finish. The other driver components will be automatically discovered and loaded (probably three different components will be discovered). This may take some time.
and if any warning appears regarding digital certificates, etc. ignore them and select Continue anyway.
7 This process will take about 30-60

seconds.

7 Click Finish if prompted, and

reboot if prompted

12 TASCAM US-122

Macintosh

2 Double-click on the appropriate
US-122 installer package to expand it.
There are two files for the Macintosh: US-122_OS_9_x_yy.hqx for pre- OS X systems (OS 8.8 and above) US-122_OS_X_x_yy.sit for OS X systems (OS X 10.2.3 and above) Where x and yy refer to the version numbers of the software.
3 Double-click the resulting installer

Another well-documented advantage of USB is the ability to hot-plug devices (that is, plug them in and out without powering the computer down). While this applies to the US-122 as well, we recommend against plugging or unplugging the unit while running your audio application. Doing so can result in audible pops, or even hanging or crashing the program. Youll find a listing of web links and resources on hard disk recording on our Web site at www.tascam.com.

TASCAM US-122 15

Hooking up audio
To monitor output from your computer, connect the analog outputs of the US122 to your mixer, amplifier or powered monitors. Output volume is controlled by the LINE OUT level control. To record audio from the US-122 into your computer, simply connect a device to the appropriate input. Microphones should be plugged into the L and R MIC IN XLR inputs.
inputs (unbalanced when used as guitar inputs). While its possible to use both mic and line level analog inputs simultaneously on either input, in actual practice this is not recommended, as the signal level of the inputs will be summed and very likely interfere with each other. Input level is regulated by the INPUT level controls. The INPUT level controls directly affect the input level at the A/D converters on the US-122, so its advisable to use the SIGNAL and OVER indicators to help set your levels. Unlike analog tape, when recording digital audio, its important to keep your input level close to 0dB, but never to exceed it. If the input level is too high, the audio signal will clip - not a desirable sound. If the input level is too low, then the dynamic range of which the US-122s A/ D converters are capable is not being used, and the signal will be closer to the noise floor than it needs to be. In either case, this cannot be fixed after the tracks have been recorded, so its important to make this adjustment carefully.
The US-122 can supply phantom power, so if youre using condenser microphones, you will not need an external preamp or power supply.
You can connect line-level sources (e.g. keyboards and sound modules) into one of the two LINE/GUITAR IN jacks (L or R). If you wish to plug in a guitar, bass, or other high-impedance source, simply move the appropriate sliding switch to the GUITAR position. The inputs of the L and R channels are available as either balanced XLR miclevel inputs, or balanced (1/4") line-level

Hooking up MIDI

The MIDI IN and OUT jacks give you 16 channels of MIDI I/O. Simply connect the MIDI OUT of your keyboard or other device to the MIDI IN jack on the US-122, and vice versa. If youve got a MIDI sync box, you can use the MIDI ports to send and receive MTC (MIDI Time Code). This allows you to sync tracks from your MTC-capable Portastudio, DTRS multitrack, or any other machine that accepts timecode with your digital audio software, transferring tracks back and forth for editing and processing.

ASIO US-122 Driver. If your software
(for example, the bundled Cubasis) only supports 16-bit recording, a 16-bit driver has also been included.
In the Audio Control Panel, you can select the number of audio channels you wish to use, as well as the sampling rate,
Disk Cache settings, and MIDI to Audio offset. See the Cubasis manual for more information on these settings.

ASIO Control Panel

In the Audio Control Panel, click on the button marked ASIO Control Panel. The US-122 Control Panel will appear. Refer to "The US-122 Control Panel" on page 18 for information on these settings.

20 TASCAM US-122

Setting the Sample Rate and Bit Depth
The US-122 supports sample rates of 44.1kHz and 48kHz. In the Audio Control Panel, select the pull-down menu for Sample Rate and select either 44.1 kHz or 48 kHz. The US-122 control protocol includes two separate drivers for 16-bit or 24-bit operation. This selection is made in the Audio Control Panel (see the illustration).
The bundled Cubasis VST supports only 16bit audio. If you want to record in 24-bit mode you will need to upgrade to Cubase VST or another application that supports 24-bit audio.

Input Enabling

You will need to enable the inputs on Cubasis. Open the Audio Input window (see the illustration here) and select one mono track or a stereo pair. Then select the inputs on Cubasis internal mixer. If youre recording a mono input, left click on the input selector above the channel strip and select the desired input L or R. If youre recording a stereo track, the inputs will both be selected automatically Verify that the designated channels inputs (IN) are selected, and the associated channels are receiving signal.
Note that Cubasis supports only one input for recording (though this can be a mono or stereo track).

TASCAM US-122 21

Highlight a track in the arrange window, and that track will automatically be record enabled.
Verify that the drop-in and drop-out features in Cubasis (on the transport bar) are not enabled (or if so, that they are enabled at the desired locate points). Press the RECORD button on the screen.

in the Options/MIDI Setup menu. For more information on setting up VSTs very sophisticated MIDI functions, please refer to the VST manual. Connect your audio sources to the US122. Connect an analog source via the XLR or 1/4 inputs.

Recording Your Tracks

In Cubasis, choose the input(s) you wish to enable on the US-122. In the Audio menu, select Input, and click on the input pair on the US-122. The green Input icons will light in VSTs Input window for active inputs. Select the Audio track(s) to record to by highlighting that track in the Arrange window.
flicker, or nothing at all, on the SIGNAL LED. You can regulate the input level of the input source in several ways. First, make sure that the signal youre sending to the US-122 is within a reasonable range - it should illuminate the green SIGNAL LED, but the red OL LED should only flicker occasionally. You can then fine adjust the level with the input level controls for the selected channel(s). On Cubasis Transport Bar, you can enable the recording to drop in or out of Record based on the locate points youve set. If you do not wish to enable this function, make certain the buttons for drop in and drop out are not enabled. Press the RECORD button on the screen. If youve got the metronomes Count-off function enabled, youll hear a one or two bar countoff, and then the program will enter Record mode. It will stop recording when it reaches the drop out point, or if none is enabled, when you hit the STOP button. Cubasis will now create a display of the track(s) youve just recorded. This can take a few seconds to a few minutes, depending on how long the recorded tracks are and how many there are. Youll then see the tracks appear in your arrange window.
If this is the first track recorded in a given project, Cubasis will probably respond with a dialog box asking you for a path to save the audio files. It is highly recommended that you create a unique folder for each song or project, as audio.WAV files can accumulate very quickly on your hard disk, and keeping them organized can get pretty complicated.
Once youve enabled your tracks, youll want to monitor audio through them to set your levels. Open Cubasis Monitor Mixer (Audio/Monitor menu), and make certain youve assigned your channel inputs and enabled them. You should see audio signal on those channels meters (assuming youre sending signal from your source). If your input signal is too high, the OL LED will glow steadily red. If the signal level is too low, you might only see a

24 TASCAM US-122

Overdubbing

26 TASCAM US-122

When an application is using the Sound Manager inputs, this Input Source field is grayed out, displaying the current inputs but preventing you from changing them here. You can still change the input pair without quitting your program, however. To do this, bring up the US-122 control panel and go to the System tab. You will find a selection there labeled Sound Manager Input. Here you can change the input pair at any time, even when an audio program is active. The grayed out Input Source field in the Sound control panel Input section will display any input changes you make.

MacOS 8.6

The Monitors and Sound control panel in MacOS 8.6 has a Sound section. It displays the currently selected Sound Manager output and lets you select among several Built In input sources. It cannot be used to select the US-122 as the Sound Manger input or output. The Sound control panel has a selection line at the top to let you choose among Alert Sound, Sound In, Sound Out, and Volume windows.
Extras/Sound Control Panel.) With Output selected, you can choose US-122 as the Sound Manager output. Since the US-122 has its own output volume control, its slider under Volume in this control panel is only used to enable or mute the US-122 output.
Under Sound In you can select the US122 instead of the Macs Built-in sources. You can also do this under the US-122 control panels System tab. There you will find a field labeled Sound Manager Input. You can change this setting at any time, even while a program is using the Sound Manager I/O.
If your Sound control panel does not have all these options, you should use the alternative Sound control panel found in Apple

TASCAM US-122 27

Setting audio I/O options under OS X (10.2.3 and above)
In Mac OS X, you can set the preferred audio input and output device using the Sound Preference Pane, or very often you can select the audio input and output devices from the applications themselves.
To use the System Preferences:
From the Apple menu, select System Preferences and click the Sound icon. Click the Output tab and choose the TASCAM US-122 as the output device. Click the Input tab and choose the TASCAM US-122 as the input device.

You may choose to keep alerts and sound effects played through the Built-in audio controller.
Setting sampling frequency and bit length under OS X (10.2.3 and above)
Launch the Audio and MIDI Setup application. Click the Audio tab. You can also set the default input and output audio devices in this application. Make sure that the selected Audio device on the left side of the screen shows the TASCAM US-122. Set the Current format of either the input or the output section to the sampling frequency and bit length you want to use. Note that some applications allow you to override this setting. This program also allows you to set the input and output gain of the US-122 audio I/O.

28 TASCAM US-122

Troubleshooting (Windows)
When installing the US-122 for the first time, if you experience any unusual behavior, here are some things to check: Under Recording, US-122 L:R should appear in the drop down menu
MIDI Drivers: In Control Panel /
Multimedia, select the MIDI tab. When Single Instrument is selected, you should
Audio Drivers In Control Panel /
System / Device Manager (Win98SE/ ME) or Control Panel / System / Hardware / Device Manager (Win2000/ XP), find the Audio control panel. Its called Sound, Video And Game Controllers in Win98SE, or Sound & Multimedia in Windows 98/ME and
see: US-122 In Control Panel / Multimedia, select the Devices tab. Under Audio Devices, you should see: Audio for US-122 Under Midi Devices And Instruments you should see: MIDI for US-122. Expand by clicking on the plus (+) sign and you should see: US-122 Port 1 Port 1 corresponds to the US-122s MIDI I/O ports.
Windows 2000/XP. You should see two entries for the US-122: TASCAM US-122 US-122 WDM Interface In Control Panel / Multimedia, select the Audio tab. Under Playback, US-122 Out should appear in the drop down menu

Tech Support Contacts

If youre unable to solve an installation problem, youve got several options for help. First, we recommend you visit our Web site at www.tascam.com, and check for any updates, FAQ or support news. Also on our Web site, youll find our always lively Online User Forums. TASCAM Product Specialists are on line to field questions, but dont be surprised if your question is answered by another user. The BBS is also a forum for discussion, comments and ideas on the US122, US-224 and US-428. Youll find users of a variety of software platforms, so someones likely to be familiar with your program of choice. Also, since many of the situations youre likely to encounter will be related to the software youre using, its a good idea to check not only our Web site, but the Web sites and resources of the software programs manufacturer as well. You can also contact our telephone support. Outside the US, please see the Contact page of our Web site for worldwide contact information.

TASCAM US-122 29

Before Contacting Us
Before contacting us with your query, please have the following information available: Type of Computer (PC or Mac), processor type and speed, and (if possible) motherboard? Type of USB Host controller (see the US-122 manual for details)? Installed RAM, type of hard drive(s)? Type of graphic card? What OS are you running? If running Windows98SE, have you installed the HotFix? What other hardware is installed in this computer? SoundBlaster or other audio cards? Other USB devices/hubs? Scanner, CD burners, WinModem, etc.? What application(s) are you running? If running the bundled Cubasis application, is/was another version of Cubase or Cubasis installed? What plug-ins do you have installed? Please provide us with full details of your problem, including: Any errors or oddities encountered during setup and installation. Items listed above that do not appear. Any error messages encountered. Please try to copy or quote them in full. Any behavior that may cause errors, especially repeatable ones.

30 TASCAM US-122

Troubleshooting FAQ
While this manual contains some basic questions, you will find a much more detailed FAQ document on the TASCAM Web site. should light to indicate the presence of analog audio signal at the inputs. Make sure your monitor or headphone levels are turned up, and connected correctly.
Q. I dont see the US-122 in Cubasis Audio Control Panel. A. Check to see if the US-122 is
installed correctly within your OS. In Windows, go to the Device Manager (My Computer/Control Panel/Setup), and click on the Sound, video and Game controllers tab to make sure the US-122 is installed and operating correctly. Also check to see that your USB cable is connected securely, and that the unit is powered up before booting Cubasis.
Q. My audio is distorted. A. Check to see if the signal is overloading. The red OL indicators should only occasionally flicker. In the case of a digital input, try reducing the output level of the source.
Q. I can see a response on screen from my DAW to the US122, but I dont hear any audio. A. Make sure your audio signal path is
correctly routed. Make sure the channels youre trying to monitor are not in Input mode. Make sure your output level is turned up. Make sure that the US-122 ASIO driver (16 or 24 bit) is selected

Q. Ive connected audio to the US-122, but cant hear anything. A. Make sure your input levels are sufficient. The green SIGNAL indicators

TASCAM US-122 31

Audio specifications

Nominal input levels

MIC L and R (XLR balanced) 54 dBu (TRIM=max) to 16 dBu (TRIM=min)
LINE/GUITAR input in LINE position 34 dBu (TRIM=max) to +4 dBu (1/4" jack, balanced) (TRIM=min) LINE/GUITAR input in GUITAR posi- 42.2 dBV (TRIM=max) to 4.22 dBV tion (1/4" jack, unbalanced) (TRIM=min) INSERT returns 10 dBV

Maximum input levels

MIC L and R (XLR balanced) 0 dBu
LINE/GUITAR input in LINE position +20 dBu (1/4" jack, balanced) LINE/GUITAR input in GUITAR posi- +11.8 dBV tion (1/4" jack, unbalanced) INSERT returns +6 dBV

Input impedance

MIC inputs (XLR balanced) 2.2 k
LINE/GUITAR input in LINE position 22 k (1/4" jack, balanced) LINE/GUITAR input in GUITAR posi- 910 k tion (1/4" jack, unbalanced) INSERT returns 100 k

Nominal output levels

LINE OUTPUTs (unbalanced RCA) INSERT sends 10 dBV 10 dBV

Maximum output levels

LINE OUTPUTs (unbalanced RCA) INSERT sends PHONES (1/4" stereo jack) +6 dBV +6 dBV +4.2 dBV (100 k), phones level at 3 dB

32 TASCAM US-122

Maximum output power
PHONES (1/4" stereo jack) 10 mW + 10 mW (40 ), phones level at 3 dB

Audio performance

Signal-to-noise ratio and dynamic range
MIC IN to INSERT send LINE IN to INSERT send LINE IN (through ADC and DAC) to LINE OUT LINE IN (through direct monitor) to LINE OUT GUITAR IN to INSERT send LINE OUT (from digital source) >100 dB (A weighting, TRIM=min, input impedance at 150 ) >100 dB (A weighting, TRIM=min, input impedance at 150 ) > 93 dB (A weighting, TRIM=min, input impedance at 150 , LINE OUT=3 dB) > 97 dB (A weighting, TRIM=min, input impedance at 150 , LINE OUT=3 dB) > 98 dB (A weighting, TRIM=min, output impedance at 600 ) >99 dB (A weighting, LINE OUT=3 dB)