[Jackit-devel] [linux-audio-user] JACK samplerate stuck at 48000

[Paul Davis]

On Tue, 2006-06-20 at 20:27 +0200, Florian Paul Schmidt wrote:
> On Tue, 20 Jun 2006 13:29:18 -0400
> Lee Revell <rlrevell at joe-job.com> wrote:
> 
> > On Tue, 2006-06-20 at 10:24 -0700, Mark Knecht wrote:
> > > Many built-in/inexpensive sound cards are stuck at 48K. Possibly this
> > > one is also?
> > > 
> > 
> > It's still a bug for JACK not to report any error.
> > 
> > Does aplay report any errors with a 44100Hz file?
> 
> Hmm, is this it:
> 
> Index: drivers/alsa/alsa_driver.c
> ===================================================================
> --- drivers/alsa/alsa_driver.c  (revision 976)
> +++ drivers/alsa/alsa_driver.c  (working copy)
> @@ -445,13 +445,13 @@
>         frame_rate = driver->frame_rate ;
>         err = snd_pcm_hw_params_set_rate_near (handle, hw_params,
>                                                &frame_rate, NULL) ;
> -       driver->frame_rate = frame_rate ;
> -       if (err < 0) {
> +       if (err < 0 || (driver->frame_rate != frame_rate)) {

no, that doesn't work.

the lack of any "retval != requested_val" test was changed a year or two
back, on purpose. if we want to test this, the test has to be flexible:
some h/w will report as real rate of 44099 rather than 44100.