uaudio, M-Audio FastTrack Pro device - sound distorted

Marcel Bonnet marcelbonnet at
Wed Apr 27 01:19:46 UTC 2011

On 26 April 2011 05:10, Clemens Ladisch <clemens at> 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 There is an outdated patch that tries to make this device work on Linux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:
> Thanks, I'll keep that URL for studing soon.
I was using Linux kernel 2.6.26 (debian lenny - 5.x) until last month and
the playback worked fine.

> Regards,
> Clemens

Marcel Bonnet
*"No princípio era o caos... e no meio também."*
FreeBSD inside

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