uaudio, M-Audio FastTrack Pro device - sound distorted

Hans Petter Selasky hselasky at
Tue Apr 26 08:48:08 UTC 2011

On Tuesday 26 April 2011 10:10:21 Clemens Ladisch wrote:
> Marcel Bonnet wrote:
> > I'm using the M-AUDIO FastTrack Pro USB audio interface, but every time I
> > play or record, the sound get distorted.
> > 
> > uaudio0: Play: 44100 Hz, 2 ch, 16-bit S-LE PCM format
> > uaudio0: Record: 48000 Hz, 2 ch, 16-bit S-LE PCM format
> This device uses one internal sample rate; using different rates for the
> playback and capture interfaces won't work.
> AFAIK there are some undocumented constraints on which configurations
> and alternate settings can be used; and in some alternate settings, the
> device uses big-endian samples.  This cannot be handled with the generic
> parts of the uaudio driver; it requires device-specific workarounds.
> There is an outdated patch that tries to make this device work on Linux
> on this page:

Try to set:

sysctl hw.usb.uaudio.default_rate=44100

Then replug the device.

We could possible make a workaround for this.


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