[PD] problem with audio I/O under Win2k

Olaf Matthes olaf.matthes at gmx.de
Wed Apr 3 21:46:30 CEST 2002

Hi Miller,

audio I/O in Pd seems to be a problem under Win2k in general - or I just have the
wrong hardware...

Since latency was not a problem in this case (but I need full duplex), I
increased buffersize to the upper limit - no success. Using a PCI soundcard (a
Yamaha waveforce which costs a bit more than $10 und worked perfectly all right
unter WinNT) resultet in Pd eating up 100% CPU when I started it the first time.
Starting Pd a second time worked better but about every two minutes CPU usage
jumped up to 100% for about 30 seconds - but with audio I/O not closing!
Then I used the standard Win trick "format c:" and started again only installing
the hardware I really need. This seems to work. Tomorrow night will proove.

I'll try to investigate this issue a bit further in case I find the time. I'm
just wondering if there's anybody else having this strange problems...?

BTW I once wanted to try jMax - it did not work. After I changed to the Yamaha
card it works. So everything I know is: don't use on-board soundcards...


Miller Puckette schrieb:

> HI Olaf,
> if you can do without sound input, run -noadc (or vice versa, "-nodac".)
> Otherwise, try increasing audio buffer size...  I've seen some audio hardware
> that just freezes unexpectedly when running full duplex, probably because
> the drivers are buggy.  As a last resort, invest $10 in a PCI soundcard...
> cheers
> Miller
> On Tue, Apr 02, 2002 at 10:32:00AM +0200, Olaf Matthes wrote:
> > Hi list,
> >
> > I have some problems getting reliable audio I/O with Pd (0.35 test 11).
> > After a few moment I get "audio I/O stuck... closing audio" and have to
> > restart Pd to get audio again. DSP processing still works (I can listen
> > to an ogg vorbis stream that I send with Pd)....
> > BTW. this happens under Win2k Prof. using the internal soundcard (Analog
> > Devices with SoundMAX driver).
> >
> > Any help is very appreciated!!! - Because I have a performance on
> > Thursday and really need audio I/O!
> >
> >
> > Olaf
> >

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