TASCAM

US-122L / US-144 Windows Driver Release Notes
Version 1.11 October 30, 2007

Updates

Always ensure that you are running the latest driver software and US-122L or US-144 firmware by visiting http://www.tascam.com
Installation Frequently Asked Questions
What versions of Windows does the US-122L and US-144 support? Windows driver version 1.11 supports 32-bit Windows XP SP2 and 32-bit Windows Vista. This driver does not support 64-bit Windows. When I plug in my US-122L or US-144, Windows Hardware Wizard appears but is unable to install the drivers. How do I install the drivers? The driver installation must be started before plugging in your US-122L or US-144. If you have already plugged it in without the drivers being installed, simply unplug the unit, exit all hardware wizard windows, and then launch the driver setup program. If you are using the CD-ROM that came with your unit, inserting it should automatically launch a menu that gives you the option to install the drivers. Select "Install Drivers" and follow the on-screen instructions. If you have downloaded drivers from TASCAMs web site, extract all the files from the ZIP archive to temporary folder and then launch Setup.exe and follow the on-screen instructions. When I insert the installation CD-ROM into my Windows computer, it does not automatically launch a menu. How can I launch this menu? It is possible that the CD-ROM autorun feature has been disabled on your computer. You can launch the installation menu manually by opening the CD-ROM in Windows Explorer and double-clicking the file: Autorun Menu.exe

Owners Manual Addendum

Multi-Client Operation
On Windows, both the US-122L and US-144 have the ability to mix the outputs of simultaneously running audio applications that are using different driver protocols. For example, the following configurations are possible: ASIO App (Ableton Live) + WDM App (SONAR) + GSIF2 App (GigaStudio) ASIO App (Ableton Live) + MME App (iTunes) + GSIF2 App (GigaStudio)

New Features

Added in 1.11
Additional improvements have been made to the control panels Audio Performance control, reducing the latency at some settings. Because of these changes, you may find it beneficial to readjust the Audio Performance settings for optimal performance on your computer.

Added in 1.10

Support for 32-bit Windows Vista has been added.

Added in 1.02

GSIF2 low-latency kernel MIDI has been implemented for use with GigaStudio. When choosing a US-122L or US-144 MIDI port in GigaStudio, you will now see two ports available. One is a normal latency port and the other is a GSIF2 lowlatency port offering faster MIDI response. Overall audio latency has been improved.

Maintenance Items

Fixed in 1.11
This version corrects a MIDI output problem introduced by version 1.10.

Fixed in 1.03

Previously, the Audio Performance control in the Windows control panel was not working correctly, causing higher than expected latency. This has been corrected in 1.03. Previously, certain MIDI real-time messages that are output by some controllers, such as the Yamaha CBX-K1 and CBX-K2, could not be received properly. This has been fixed in 1.03. Previously, the driver installer could stall on Windows machines in rare cases where more than one instance of the "rundll32.exe" process was running. This has been fixed in 1.03.

Fixed in 1.02

Previously, it was not possible to use a US-122L or US-144 with TASCAM GVI in WDM mode. This has been fixed in 1.02. Now either WDM or ASIO can be used. An install log file now gets written to the WINDOWS/TEMP directory. If you experience installation problems, have this file ready to email to support personnel. Previously, the US-122L and US-144 only supported 24-bit communication with WDM audio applications. Version 1.02 now supports 16, 18, 20, 22, and 24-bit

communication with WDM audio applications. Version 1.00 required special configuration steps for SONAR. It is no longer necessary to follow these steps.

Known Issues with 1.11

PCs with nVIDIA USB controller chips may not offer optimum performance for audio streaming over USB 2.0, resulting in audio artifacts. A higher latency setting or the addition of a non-nVIDIA USB 2.0 card is required. o To find out what controller chip your PC uses: Go to START > Control Panel > System Click on the Hardware tab, then the Device Manager button Click the + (plus) sign next to Universal Serial Bus Controllers You will see the chip manufacturer of all installed USB controllers If a WDM audio app (e.g.Windows Media Player or iTunes) is running and a US122L / US-144 unit changes its sample rate, the audio will play at the wrong pitch. The workaround is to quit the WDM audio app and launch it again. The app should now play audio at the correct pitch. In order to use a US-122L or US-144 reliably with Windows Media Player, select the US-122L or US-144 as the Sound playback Default Device in the Audio tab of the Sounds and Audio Devices control panel. Do not configure the audio interface from within Windows Media Player.

Miscellaneous

The MIDI Activity and USB LEDs may continue to illuminate after a connected computer is shut down. This is because some computers continue to provide power on the USB cable even when shut down. The US-144's digital input will not be available if the clock mode in the control panel is set to "Internal". To use the digital input, set the clock mode to Automatic so the US-144 will clock to the external device. The MIDI IN indicator lights when any MIDI data is being received at the MIDI IN connector. A device that transmits the MIDI Active Sense message will cause this indicator to flash constantly. To avoid this, disable the use of MIDI Active Sense on the sending device. Cubase and Nuendo allow their ASIO ports to be renamed. In the event it becomes necessary to reset the port names (as would be the case when switching between a US-122L and a US-144), perform the following steps: o From the Devices menu, select Device Setup o Click on VST Inputs, then click the Reset button o Click on VST Outputs, then click the Reset button

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.
14 Refer all servicing to qualified service personnel.
Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped. Do not expose this apparatus to drips or splashes. Do not place any objects filled with liquids, such as vases, on the apparatus. Do not install this apparatus in a confined space such as a book case or similar unit. Declaration of Conformity Model Number : US-122 Trade Name : TASCAM Responsible party : TEAC AMERICA, INC. Montebello, California, U.S.A. Telephone number : 1-213-726-0303 This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation.

2 TASCAM US-122

Table of Contents

1 Introduction

Overview.. 4 Features. 4
Whats in the package.4 Copyright and trademarks..5 Nomenclature used in this manual..5 Audio Control Panel..20 ASIO Control Panel..20 Setting the Sample Rate and Bit Depth..21 Input Enabling..21

ASIO 2 Direct Monitoring. 22
2 Controls and indicators
Top Panel.. 6 Rear Panel. 7 Front Panel Descriptions. 8
7 A Sample Recording Session in Cubasis
Setting Up.. 23 Recording Your Tracks. 24

Overdubbing..25

3 Installation

System Requirements. 9

PC (Windows)..9 Mac OS...10 Installation..10 Installation under Windows.11 Macintosh.13 Setting Up OMS (Mac OS pre-X only)...13

8 Other Applications

Setting up Sound Manager Support pre-Mac OS X.. 26 MacOS 9.0.. 26 MacOS 8.6.. 27 Setting audio I/O options under OS X (10.2.3 and above).. 28
To use the System Preferences.28 Setting sampling frequency and bit length under OS X (10.2.3 and above)..28
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

The US-122 is not supported under Windows 95. We also do not recommend Windows 98 First Edition, due to its limited USB implementation. A fast EIDE hard disk is required for throughput of multiple audio tracks. 96MB RAM is the minimum recommended, but with all digital audio programs, you will obtain better results with more RAM. An SVGA graphics card is suggested (minimum 256 colors, 800x600 resolution or better).
The US-122 has been successfully used with the following chipsets: Intel 82371 AB/EB PCI to USB Universal Host Controller Intel 82371 SB PCI to USB Universal Host Controller Intel 82801 AA PCI to USB Universal Host Controller ALi PCI to USB Open Host Controller Some other chipsets, notably those specifying Open Host Controllers or OHCI (rather than Universal Host Controllers or UHCI), have been subject to occaTASCAM US-122 9
Although this product has been checked for use with normally configured computers which meet the specifications above, we cannot guarantee the operation of the product, even with computers meeting the specifications, due to differences in architecture and implementation between computers. Chipsets are also a concern with USB audio. We have found that the most dependable motherboards are ones
sional incompatibilities. While most OHCI systems have no problems with the US-122, occasionally some older OHCI systems will exhibit problems. We have found that, in the majority of these rare cases, a PCI-based USB card utilizing an Opti-chip controller will work dependably. These cards (also available in PCMCIA format for laptops) are available through a number of manufacturers.

Mac OS

PowerPC running Mac OS 8.6 or better, and a USB port. Any Macintosh computer with one or more USB ports running Mac O/S 8.6 or later (check the Web site for updates), or Mac OS X 10.2.3 or above. Very early iMac computers may need one (or more) firmware updates to use the US-122. Which firmware update(s) is (are) needed depends on which Mac OS version is installed in the early iMac. Apple provides details in Apple Support Article #58174. PowerBook G3 Series (or later) with built in USB (or using a 3rd party PCMCIA USB Card) have been tested and work fine. Additionally, older PowerMac computers using 3rd party PCI-based USB cards also have been tested and work fine. Any iMac, G3 or G4 will work fine as well. Mac OS versions earlier than 8.6 do not implement full USB support, and are not recommended. Again, plenty of RAM and fast drives are suggested.

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.

In addition, a number of simple hardware modifications and enhancements can substantially improve your computers handling of audio, as well as your track count and DSP capability: Increase the amount of RAM in your system. While most digital audio software applications will function according to the amount of RAM in their

14 TASCAM US-122

minimum system requirements, increasing your computer's RAM as much as possible will markedly improve performance. Consider the addition of a dedicated hard disk for audio; preferably one with a high spindle rate (over 7200 rpm and a seek time of 8.5ms or less is recommended for most audio applications). Using different drives for program and audio data speeds up the seek time for the audio track data. Note that simply partitioning a large drive will not have the same effect, as the computer will still be accessing the same physical drive. Consult your DAW applications documentation for full details of recommended drive configurations, etc. If youre presently using a PCI-based graphics card, and your motherboard has an AGP slot, consider getting an AGPbased graphics card. This will decrease traffic on the PCI bus and allow for faster screen redraws. Special Note: For even more detail on optimizing your PC for audio, please refer to the Computer Recording Support areas on the TASCAM Web site for PC Optimization documents.

Notes on USB interfacing

The USB protocol is an extremely versatile one, and much has been made of the possibility of using multiple (over 100) devices on a single bus. While this is certainly a possibility, we recommend using as few other USB devices as possible in a system equipped with the US-122. The demands placed on the USB bus by passing multiple tracks of audio through it are considerable, and adding additional devices will risk reducing that bandwidth.
audio. We strongly suggest unplugging any non-essential USB devices while recording with the US-122. USB keyboards and mice are the notable exceptionsin most cases they are passive devices with very minor bandwidth requirements.

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.

16 TASCAM US-122

Using Direct Monitoring
In digital and computer audio, the amount of time it takes for the input signal to pass through the circuitry of the unit and the software processing and arrive at the outputs will sometimes result in an audible delay (this is commonly referred to as audio latency). This added delay can be confusing when, for example, youre trying to overdub to previously recorded tracks. The direct monitor feature built into the US-122 eliminates this problem by providing a way to listen to the signals youre recording directly, without any computer processing delay. When the
DIRECT switch is on, the sound passed through the USB and computer processing is not monitored, and the input signals are passed directly to the outputs for monitoring.
You can use the DIRECT MONITOR level control to set the level of the directly monitored signal, and the MONO switch to fold the two direct monitor stereo channels into mono. The LINE OUT and PHONES level controls directly affect the audio levels that appear on the LINE OUTPUT and PHONES jacks, respectively.

TASCAM US-122 17

Main Page
The following description applies to both the Windows and Mac OS versions of the US-122 Control Panel program. You access the Control Panel at the following locations: Windows: Control Panel Mac OS (pre-X): Control Panel Mac OS X: /Applications/ In the Control Panels main page, you can specify a number of the US-122 options.

Buffer Size Adjustment

The US-122 driver temporarily stores input and output audio samples in buffers. Larger buffers provide more safety against other system activities interrupting the audio and producing clicks, pops or other audible artifacts. Smaller buffers provide lower latency when using the computer to send input audio to output channels in order to monitor the input. The driver lets you select which buffer size works best for your computer and audio application.

To adjust the buffer size, run the US-122 Control Panel. The Latency slider lets you change the buffer size from a minimum of 256 samples (128 samples on the Mac) to a maximum of 2048 samples. All audio programs that use the US122 must quit before a new audio latency setting takes effect. This slider is marked Audio Safety Buffer under OS X, and is calibrated in milliseconds, rather than samples. Using Cubase VST at 44.1 kHz sampling rate, a 256 sample buffer size gives approximately. 12 ms of monitoring latency, while a 2048 sample buffer gives approximately 43 ms latency.
This adjustment does not affect the latency of the US-122s hardware input monitor, which is always less than 1.5 ms.

18 TASCAM US-122

Optimizing the USB
There is another option available which allows you to disable the audio, and only use the MIDI facilities of the US-122. This is useful if you have a high volume of MIDI data to be transmitted through the interface and the timing is critical.

The Chromatic Tuner

Open the US-122s control panel and select the Tuner tab. 440 Hz for a middle A note, but you can use the up/down arrows to change it to a number between 430 and 450 Hz. As you play, the detected note will be displayed below the Tuning lights (A# or E, for example). If the note is sharp, the Sharp arrow and a Tuning light to the right of 0 are bright red; if the note is flat, the Flat arrow and a Tuning light to the left of 0 are bright red. In the Input section, select the US-122 input channel that you want to tune (L or R). Play a note and adjust the level for that input until the signal is strong, but not clipping. The Level meter on the screen should display bright green segments without lighting the top red segment. If desired, you can change the Tuning Standard in the Reference section. Normally, the Tuning Standard is set to The numbers below the tuning lights indicate how far out of tune the note is, in cents (100 cents is one semitone). When the note is in tune, the center 0 light and both the Flat and Sharp arrows are bright green.
The chromatic tuner consumes some CPU bandwidth in your system. Therefore, when you finish using the tuner, we recommend that you either select another control panel tab or close the control panel.

TASCAM US-122 19

This section is intended to present the basic concepts needed to interface the US-122 with the bundled Cubasis VST application. This discussion, however, is not intended to replace your softwares users manual. If youve got questions specific to Cubasis, please refer to the Cubasis User Manual for further detail.
Selecting the US-122 as your Audio Device

Audio Control Panel

In Cubasis, open the Audio Control Panel. Its located in the Audio pulldown menu, under System. Select the ASIO Device pull-down menu, and select
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.

The Macintosh Sound Manager is a standard 2-channel software interface for playing and recording sound on a Mac. The audio inputs and outputs (speakers) that are built into any Macintosh use the Sound Manager interface, and essen-

MacOS 9.0

The Sound control panel in MacOS 9.0 is used to select Sound Manager inputs and outputs. With this control panel active, click on the left of the window where it says Output to display the possible Sound Manager output devices. On the right, click on US-122 to select it as the Sound Manager output. Use the output volume slider to mute or enable sound output. Moving the volume slider to the right or clicking on it will send a system beep out of the US-122 outputs. When you click Input on the left, the available input devices appear on the right. Click on US-122 to select it as the Sound Manager input device. Below it is Input Source: select L:R.

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.

Total harmonic distortion (THD)
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 <0.007% (TRIM=min, 1 kHz, +20 dBu input) <0.007% (TRIM=min, 1 kHz, +20 dBu input) <0.009%, +20 dBu input, LINE OUT= 3 dB, phones output at minimum) <0.009%, +20 dBu input, LINE OUT= 3 dB, phones output at minimum) <0.05% (TRIM=min, 1 kHz, 4.2 dBV input)

TASCAM US-122 33

Other characteristics

Digital audio

A/D conversion D/A conversion Sampling frequencies 24-bit, 17 samples delay 24-bit, 15.4 samples delay 44.1 kHz, 48 kHz (software selectable)
MIDI IN and MIDI OUT ports Conform to MIDI standards
Host computer compatibility
Windows Operating system Macintosh Communication Audio/MIDI interface protocols Bundled software Windows Macintosh Windows 98SE, Windows Me, Windows 2000, Windows XP Mac OS 8.8 and above (pre-OS X) or OS 10.2.3 and above (OS X) USB 1.1 ASIO, MME, GSIF ASIO, Sound Manager, CoreAudio and CoreMIDI (OS X), OMS, Free MIDI Cubasis (not for OS X), Giga24 (Windows only)

Physical characteristics

Dimensions
External dimensions (w x h x d) Weight 149 x 60 x 196 (mm), 5.9 x 2.4 x 7.7 ()in) 925 g (2 lb)
Supplied by USB connection 5 V, maximum current 500 mA

34 TASCAM US-122

Dimensional drawing
2mm (0.1") 40mm (1.6") 196mm (7.7") 145mm (5.7") 149mm (5.9") 60mm (2.4")

TASCAM US-122 35

TEAC CORPORATION

TEAC AMERICA, INC.

Phone: +81-422-52-5082 3-7-3, Nakacho, Musashino-shi, Tokyo 180-8550, Japan Phone: +1-323-726-Telegraph Road, Montebello, California 90640

www.tascam.com

TEAC CANADA LTD.
Phone: +1905-890-8008 Facsimile: +1905-890-Wallace Street, Mississauga, Ontario L4Z 1Z8, Canada www.tascam.com

TEAC MEXICO, S.A. De C.V

Phone: +52-555-581-5500 Campesinos No. 184, Colonia Granjes Esmeralda, Delegaacion Iztapalapa CP 09810, Mexico DF www.tascam.com

TEAC UK LIMITED

Phone: +44-1923-Marlin House, Croxley Business Park, Watford, Hertfordshire. WD1 8TE, U.K. www.tascam.co.uk

TEAC DEUTSCHLAND GmbH

Phone: +49-611-71580 Bahnstrasse 12, 65205 Wiesbaden-Erbenheim, Germany www.tascam.de

TEAC FRANCE S. A.

Phone: +33-1-42-37-01-Rue Alexis-de-Tocqueville, CE Antony Cedex, France www.tascam-europe.com