Help File
Windows driver v2.2
Macintosh driver v2.0

General

Windows OS

Mac OS

Audio Software Notes


 

Front Panel - Controls, Indicators

Input Gain Controls

Adjusts input gain levels. Gain is minimized (not turned off) at full counter-clockwise setting. Gain control only affects analog input sources.

48 V Phantom Power Switch and LED

Toggles 48-volt phantom power for both microphone inputs. Phantom is present only at the XLR microphone inputs. LED illuminates when phantom power is applied.

Input Selection Switches

Selects the input connection type. The adjacent LED indicates selected input type. For each input channel (1 or 2), a single input can be selected - they do not get mixed together. S/PDIF input is selected for both channels.

Input Level Meter

Calibrated in dB FS, the meter shows the input level of each channel (analog inputs only).

Power LED

Illuminates when USBPre is connected to a computer and receiving power over the USB port.

MONO Monitoring Switch

Toggles between mono and stereo monitoring of analog input audio in the headphones only, especially useful when multi-track recording and recording from one input. Red LED illuminates when MONO is selected. Audio from the PC is unaffected.

Mix Control

Selects the signal source to be monitored in the headphones between analog source audio (PRE) and computer audio (PC). Listening to PRE audio allows zero latency monitoring of analog recording sources. The center position mixes monitoring of both source and computer audio. The signal at the PC Audio Output is unaffected by this control. NOTE: S/PDIF digital inputs cannot be monitored in the headphones. S/PDIF signal can be monitored after being processed by the computer.

Headphone Volume Control

Adjusts overall headphone volume.

Side Panels - Connectors

Mic Inputs

Active-balanced XLR inputs accept low-impedance microphone level signals.

Line/DI Inputs

Dual function inputs. Accepts balanced line level signals when the front panel switch is in LINE position. Accepts musical instrument inputs such as guitar pick-ups and electronic keyboards when the front panel switch is in DI position. Impedance changes automatically with front panel Selection Switches.

Tape Inputs

Accepts consumer level inputs such as CD, MiniDisc, DAT, and cassette players via RCA connectors.

Headphone Outputs

3.5 mm and ¼-inch TRS stereo headphone outputs can drive low-impedance headphones. Note: The USBPre can drive headphones to dangerously loud levels - take caution when raising the headphone level.

PC Audio Output

Audio output to feed powered loudspeakers or consumer level DAT, MiniDisc, and CD recorders. RCA connectors. Computer audio only. The Volume level from this connection is controlled only by the PC and its software.

S/PDIF Input and Output

Coaxial digital input and output connectors (two channel). Input is selected via the front panel input selection switch. S/PDIF output mirrors the PC Audio Output signal.

USB Port

USB B Type connector, interconnection with the computer; provides all data and power to the USBPre via USB bus powering.

Bottom Panel - Controls

Microphone Input Pad

15 dB pad for use with "hot" microphone inputs. Pad can be inserted per channel.

 

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