[PD] Natty SPDIF samplerate 44.1k / 48k problem (OSS)

Ingo ingo at miamiwave.com
Thu Nov 10 14:31:17 CET 2011

Thanks Roman,

but no - the soundcard supports up to 192k sampling rate and I do get it to
playback at 44.1k every once in a while. When
I switch PCM on/off a couple of times all the sudden it starts working
correctly. I can see it on my RME-HDSP. It shows 48k at startup with no
sound and after switching it on an off and resetting the samplerate in Pd a
number of times it picks up the correct sample rate.
The HDSP shows 44.1k and there is sound. So it does support 44.1k.

The question is: How do I set this samplerate at system startup in Natty?
I just read about a way how to do it in OSS4 but I'm still using the older
OSS ( OSS 3 ? ) because of the MIDI support.


> Hi Ingo
> On Thu, 2011-11-10 at 13:10 +0100, Ingo wrote:
> > Hi everybody,
> >
> > I need some help about sample rate settings.
> >
> > I would like to use my SPDIF Out with Pd. Unfortunately it looks like
> either
> > the soundcard or the audio system (OSS) starts up with 48,000 Hz while
> Pd is
> > set to use 44,100 Hz (that's necessary because of the samples being at
> > 44.1k).
> >
> > Does anybody know where or how I can set the PCM sample rate to match
> Pd's
> > sample rate?
> >
> > None of the soundcard mixers I was checking have an option to set the
> sample
> > rate and I don't know where the OSS files are located.
> I don't know about your soundcard, but many (cheap) soundcards only
> support 48kHz. You probably won't notice it with ALSA, since ALSA is
> capable of resampling the sound before pushing it to the card, but if
> you really are using old-school OSS, I think  there is no way to
> resample.
> Just in case, you're sound card really only supports 48kHz, would
> resampling your audio files be an option? At least then you have some
> control over the resampling quality.
> Roman

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