Date: Tue, 26 Apr 2011 10:47:01 +0200 From: Hans Petter Selasky <hselasky@c2i.net> To: freebsd-multimedia@freebsd.org Cc: Clemens Ladisch <clemens@ladisch.de> Subject: Re: uaudio, M-Audio FastTrack Pro device - sound distorted Message-ID: <201104261047.01454.hselasky@c2i.net> In-Reply-To: <4DB67DED.1030906@ladisch.de> References: <BANLkTimAZtcpe2Ba5P0qsHKiH2-G691GCQ@mail.gmail.com> <4DB67DED.1030906@ladisch.de>
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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 There is an outdated patch that tries to make this device work on Linux 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: https://bugtrack.alsa-project.org/alsa-bug/view.php?id=3249 > > Try to set: sysctl hw.usb.uaudio.default_rate=44100 Then replug the device. We could possible make a workaround for this. --HPS
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