[alsa-devel] Changing the sample rate/channels of an already opened PCM stream

Ed Schouten ed at fxq.nl
Tue Jun 19 10:06:02 CEST 2007

Hello Clemens,

* Clemens Ladisch <cladisch at fastmail.net> wrote:
> Ed Schouten wrote:
> > I have been trying to get the device to reset so I can change the sample
> > rate, but for some reason, it just gets ignored. Can someone explain me
> > how it's possible to reset the sample rate after preparing the handle?
> The various snd_pcm_hw_params_set_xxx() functions choose some value for
> a parameter that has not yet been set, but they do not change a
> parameter once it has been set.  To reset all parameters in a hw_params
> container, call snd_pcm_hw_params_any() again.

Calling snd_pcm_hw_params_any() before changing the sample rate did the
trick. Thanks a lot! :-)

 Ed Schouten <ed at fxq.nl>
 WWW: http://g-rave.nl/
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