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  • Damien Zammit's avatar
    ALSA: usb-audio: Support for Digidesign Mbox 2 USB sound card: · cb99864d
    Damien Zammit authored
    This patch is the result of a lot of trial and error, since there are no specs
    available for the device.
    Full duplex support is provided, i.e. playback and recording in stereo.
    The format is hardcoded at 48000Hz @ 24 bit, which is the maximum that the
    device supports.  Also, MIDI in and MIDI out both work.
    Users will notice that the S/PDIF light also flashes when playback or recording
    is active.  I believe this means that S/PDIF input/output is simultaneously
    activated with the analogue i/o during use.
    But this particular functionality remains untested.
    Note that this particular version of the patch is so far untested on the
    physical hardware because I have not compiled a full kernel with the changes.
    However, extensive testing has been done by many users of the hardware
    who believe other versions of my patch have worked since circa 2009.
    [Modified to make a function static by tiwai]
    Signed-off-by: default avatarDamien Zammit <>
    Signed-off-by: default avatarTakashi Iwai <>