[alsa-devel] [PATCH] speaker-test: Allow sampling rates up to 768000

[Takashi Iwai]

On Thu, 07 Jun 2018 11:13:33 +0200,
Michael Nazzareno Trimarchi wrote:
> 
> Hi
> 
> On Thu, Jun 7, 2018 at 5:10 PM, Julian Scheel <julian at jusst.de> wrote:
> > There are audio devices around that support up to 768kHz playback, allow
> > testing them by increasing the maximum supported sampling rate.
> >
> > Signed-off-by: Julian Scheel <julian at jusst.de>
> > ---
> >  speaker-test/speaker-test.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/speaker-test/speaker-test.c b/speaker-test/speaker-test.c
> > index 0cdecb3..773af0a 100644
> > --- a/speaker-test/speaker-test.c
> > +++ b/speaker-test/speaker-test.c
> > @@ -1034,7 +1034,7 @@ int main(int argc, char *argv[]) {
> >      case 'r':
> >        rate = atoi(optarg);
> >        rate = rate < 4000 ? 4000 : rate;
> > -      rate = rate > 384000 ? 384000 : rate;
> > +      rate = rate > 768000 ? 768000 : rate;
> 
> Working with dsd and PCM, I'm scared about the ssd or network storage needed ;).
> BTW in the past I work even on no-conventional audio device, can we
> just add some flag to force any frequency or
> read the max rate supported by audio card?

This is merely a sanity check, and the program accepts only the rate
the system supports, in anyway.  Note that you can pass a higher rate
than the actual card supports; it may be converted by alsa-lib
plugin.


Takashi