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

General

Windows OS

Mac OS

Audio Software Notes


 

USBPre Control Panel - Mac OS

The USBPre Control Panel duplicates the selections of the front panel of the USBPre hardware. In addition, the USBPre Control Panel enables resetting the USBPre hardware to accommodate multiple sample rates, and accesses the help file. The Control Panel also indicates whether the USBPre is configured as a Sound Manager device or as an ASIO device. The set sample rate is indicated below the USBPre Device list.

To launch the USBPre Control Panel, select USBPre from the Control Panels list from the Apple Menu. If a USBPre is not connected, the control panel is greyed out, indicating that no USBPre hardware is connected to the computer (below).

Configuration Files

The USBPre is shipped from the factory with a record sample rate of 44.1 kHz. To change record sample rates, hold down any front panel button while plugging in the hardware. This will bring up the following menu:

The dialog box shows. Follow the instructions and click Configure:

After selecting Configure, a list of six possible configuration settings will be available. Select from the following:

Configuration Types

There are three variables to the USBPre's Macintosh configuration files. The syntax of the file names is as follows:

Input Type_Output Type_Record Sample Rate.adx

Input Types - There are two different input types, Mic In and Sound In. Both types function identically in most applications. The difference is the selection in the Sound Control Panel, where the USB audio device (USBPre) will show up as either a Mic source or a Sound In source. The one advantage of a Sound In configuration type is that the selection "Play Through Hardware" is available in the Sound Manager Control Panel. Playing through hardware is not available with Mic In types.

Output Types - Two different output types, Speaker and Line are available. With the Line configuration type the USBPre shows up in the audio output selection of the Sound Control Panel as a separate USB audio output device. Because it is seen as separate hardware, it can be selected as required. With the Speaker output types, the USBPre is not seen in the Sound Control Panel as a selection - it becomes the "built-in" audio device, and simply takes over all playback audio functions of the Macintosh. To revert to internal speakers, unplug the USBPre with the Speaker type.

Record Sample Rate Selection - Three possible record sample rates are available, 32 kHz, 44.1 kHz, and 48 kHz. When using the S/PDIF input on the USBPre it is very important to select a Record Sample Rate that matches the source material, otherwise objectionable audio will occur.

 

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