the only format that the osprey-540 audio capture driver supports is pcm. the driver supports the following data rates:

    1 8 khz

    2 11.025 khz

    3 16 khz

    4 22.05 khz

    5 32 khz

    6 44.1 khz

    7 48 khz

    these data rates are supported in 8-bit and 16-bit, mono and stereo formats. the actual osprey-540 hardware supports sampling of analog audio at 32, 44.1 and 48 khz. depending on the requested audio format, the osprey-540 driver automatically selects the most appropriate hardware sampling rate. for example, if 22.5 khz audio is desired, the audio driver selects the 44.1 khz audio rate and down samples it to 22.05 khz.

    the osprey-540 driver provides for optimal rate conversion from these base sampling rates. for digital sources, the sample rate has already been determined. the osprey-540 automatically determines the digital audio sample rate and converts this as required by the application’s requested sample rate.

    it should be noted that the osprey-540 does not currently dynamically readjust sampling rates while audio capture is in progress. thus audio capture should be stopped and restarted whenever the audio input port changes.

    for mono sources, the osprey-540 uses only the left audio channel. optionally, this can be configured to be the left channel or a mix of the left and right channels.