Sound Devices USBPre 2 User Manual And Technical Information
Sound Devices USBPre 2 User Manual And Technical Information

Sound Devices USBPre 2 User Manual And Technical Information

Portable high-resolution audio interface
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USBPre 2
User Guide and Technical Information
Sound Devices, LLC
300 Wengel Drive • Reedsburg, WI • USA
+1 (608) 524-0625 • fax: +1 (608) 524-0655
Toll-Free: (800) 505-0625
www.sounddevices.com
support@sounddevices.com

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  • Page 1 USBPre 2 User Guide and Technical Information Sound Devices, LLC 300 Wengel Drive • Reedsburg, WI • USA +1 (608) 524-0625 • fax: +1 (608) 524-0655 Toll-Free: (800) 505-0625 www.sounddevices.com support@sounddevices.com...
  • Page 2: Table Of Contents

    USBPre 2 User Guide and Technical Information Table of Contents Table of Contents ......1 Computer System Requirements .
  • Page 3: Computer System Requirements

    LLC. SOUND DEVICES is not responsible for any use of this information. SOUND DEVICES, LLC shall not be liable to the purchaser of this product or third parties for damages, losses, costs, or expenses incurred by purchaser or third parties as a result of: accident, misuse, or abuse of this product or unauthorized modifi cations, repairs, or alterations to this product, or failure to strictly comply with SOUND DEVICES, LLC’s operating and installation instructions.
  • Page 4: Quick Start Guide

    Attach the “A” plug of the (supplied) USB cable into an available “A” socket on the computer. Attach the “B” plug of the USB cable into the “B” socket on the USBPre 2. The USBPre 2’s meter LED’s will il- luminate sequentially, indicating the USBPre 2 is connected and booting up properly.
  • Page 5 Input Gain Controls do not affect digital input levels. The meters will show the audio level of the input. Launch an audio application on the computer. Make certain that the USBPre 2 is selected as the input and output device in the application’s preferences. Consult the applications documentation for further information.
  • Page 6: Front Panel Descriptions

    USBPre 2 User Guide and Technical Information Front Panel Descriptions Input Gain Controls Headphone Mono Button and LED Adjusts input gain. Gain is minimized Toggles between mono and stereo moni- (not turned off) at full counter-clockwise toring of analog input audio in head- setting.
  • Page 7: Input And Output Panel Descriptions

    USB B-type connector for interconnec- Headphone Outputs tion with the computer; provides all 3.5 mm and ¼-inch TRS stereo heaphone data and power to the USBPre 2 via USB outputs can drive low-impedance head- bus powering. USB 1.1 and 2.0 compli- phones.
  • Page 8: Dip Switch Options

    USBPre 2 User Guide and Technical Information DIP Switch Options The DIP switches on the back panel of the USBPre 2 can control various features. To adjust an indi- vidual switch, carefully move the switch with a slender tool. In the following descriptions, “Up” refers to the direction opposite the numbering on the switch casings.
  • Page 9: Mac Os Installation And Connection

    When connecting the USBPre 2 to a computer with OS X 10.5 or earlier installed, hold down the Input 1 Source Select button while pluggin in the USBPre 2. This will cause the USBPre 2 to initialize in USB Fullspeed mode, which is required for OS X 10.5 and earlier.
  • Page 10: Windows Installation And Connection

    USBPre 2 User Guide and Technical Information OS X 10.6 and later: Highlight the USBPre 2 item and adjust the sample rate and bit depth from the drop-down box labeled Format. OS X 10.5 and earlier: Select the USBPre 2 from the Properties For dropdown menu, then set the sample rate, channel count, and bit depth as desired from the dropdown menus in the Audio Input section and the Audio Output section.
  • Page 11: Adjusting Sample Rate In Windows 7 And Vista

    Click to select the item labeled “USBPre2” in the list of devices. Click the Set Default button. A green check mark icon will appear next the the USBPre 2 entry and the phrase “Default Device” will appear below the entry, indicating that the USBPre 2 is now the default playback device.
  • Page 12: Windows Xp Sound Control Panel

    USBPre 2 User Guide and Technical Information Click the Advanced tab. Select the desired bit depth and sample rate from the dropdown menu. Windows XP Sound Control Panel Follow Start> Control Panel. The control panel view will be be in either “Classic view” or “Category view”.
  • Page 13: Asio Driver

    ASIO Driver The ASIO driver for the USBPre 2 allows for low-latency operation and sample rates up to 192 KHz on Windows computers. The ASIO drivers include a WDM counterpart, so applications that use standard WDM for playback and recording will still operate as normal after installation. After instal- lation, the USBPre 2 will be available as an ASIO device in applications that utilize ASIO.
  • Page 14: Asio Driver Installation

    Proceed to http://www.sounddevices/download/usbpre2-asio.htm and download the appropriate driver based on your system type. Plug the USBPre 2 into the computer with a USB cable. Locate the downloaded fi le and double-click it to run the installer program. The welcome window will appear. Click The WinZip self extractor window will appear.
  • Page 15 The fi nal window will appear. Click Exit. Unplug the USB cable from the USBPre 2. Plug the USB cable back in to the USBPre 2. Uninstalling ASIO Driver Open the Programs and Features section (Windows 7 and Vista) or Add / Remove Programs (Windows XP) in the Control Panel (located in the Start menu).
  • Page 16 Delete the driver software for this device is checked, then click OK. In the Device Manager, expand the section titled Universal Serial Bus controllers and repeat steps 7 and 8 on the entry in this section titled USBPre 2.0 Audio 1.0.0.
  • Page 17: Linux Installation And Connection

    With some combinations of microphone sensitivity and sound pressure levels, the microphone input of the USBPre 2 can become overloaded even when the input gain is at its lowest level. A 15 dB pad can be engaged on the microphone input to reduce its sensitivity.
  • Page 18: Line Inputs

    Input 2 has an additional source labeled LOOP. This input source does not correspond to any physi- cal connections on the USBPre 2. When LOOP is selected, input 2’s source is derived from the left channel of the computer audio signal (post digital-to-analog conversion). The input 2 Gain Control affects signal The Output Gain Control does not affect the level of the signal going in to input 2.
  • Page 19: Main Outputs

    USBPre 2’s Output Gain Control. Digital Outputs When the USBPre 2 is used as a computer audio interface, the sample rate of the digital outputs (Coaxial S/PDIF and optical TOSLINK) is determined by the application settings on the computer. In Stand-alone mode, the sample rate is determined by the position of the back panel DIP switches.
  • Page 20: Sample Rate

    Sample Rate In Stand-alone mode, the sample clock is generated by the USBPre 2’s internal sample clock genera- tor, and the Sample rate is set by adjusting the DIP switches on the back panel of the USBPre 2. DIP Switch Options.
  • Page 21: High Performance Playback

    Input 2 set to Loop High Performance Playback The USBPre 2 can provide high-quality audio output from a computer to reference monitors in a studio control room or a home stereo system. Depending on the connectivity of the monitors, the bal- anced XLR outputs, unbalanced RCA outputs, or digital S/PDIF outputs can be used to send com- puter audio to the monitors.
  • Page 22: Block Diagram

    USBPre 2 User Guide and Technical Information Block Diagram...
  • Page 23: Specifi Cations

    48 V through 6.8k ohm resistors. Each mic input will supply 10 mA Powering • USB bus powered. 5 V (+/- 10%), 500 mA max current from USB port (USBPre 2 will not function if connected through a passive USB connection or hub) Dimensions (unpackaged) •...
  • Page 24: Warranty And Technical Support

    ONE (1) year from date of original retail purchase. This is a non-transferable warranty that extends only to the original purchaser. Sound Devices, LLC will repair or replace the product at its discretion at no charge. Warranty claims due to severe service conditions will be addressed on an in- dividual basis.
  • Page 25: Ce Declaration Of Conformity

    According to ISO/IEC Guide 22 Sound Devices, LLC 300 Wengel Drive Reedsburg, WI 53959 USA declares that the product, USBPre 2 Portable Computer Audio Interface is in conformity with and passes: EN55103-1, 1997 EMC-product family standard for audio, video, audio-visual and entertainment lighting control apparatus for professional use.
  • Page 26 USBPre 2 User Guide and Technical Information...
  • Page 27 USBPre 2 Rev. 1.0b - Printed in the U.S.A.

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