[alsa-devel] Zoom R16

[Takashi Iwai]

At Tue, 11 Mar 2014 09:34:14 -0400,
Jason Mancine wrote:
> 
> > My question is how did you check that the 32bit format is used.
> > And, don't do top-posting.
> >
> >
> > Takashi
> 
> Sorry, i am unsure how to not top post when replying via email.
> 
> With capture and playback .formats set to SNDRV_PCM_FMTBIT_S24_3LE, jack
> log shows:
> 
> ALSA: final selected sample format for playback:  32bit integer
> little-endian
> 
> and
> 
> /proc/asound/R16/stream0  shows:
> 
> Playback:
>   Status: Stop
>   Interface 1
>     Altset 1
>     Format: S32_LE
>     Channels: 2
>     Endpoint: 3 OUT (ADAPTIVE)
>     Rates: 44100, 48000, 88200, 96000
>     Data packet interval: 125 us
> 
> Capture:
>   Status: Stop
>   Interface 2
>     Altset 1
>     Format: S32_LE
>     Channels: 8
>     Endpoint: 4 IN (SYNC)
>     Rates: 44100, 48000, 88200, 96000
>     Data packet interval: 125 us

And are you sure that you patched correctly?  For example, if you
change the available rates in addition, does the patched kernel also
show the same change?


Takashi

> 
> 
> 
> > > On Mar 11, 2014 3:09 AM, "Takashi Iwai" <tiwai at suse.de> wrote:
> > >
> > > > At Mon, 10 Mar 2014 16:44:19 -0400,
> > > > Jason Mancine wrote:
> > > > >
> > > > > Yes, I have tried those .formats with no luck...it still
> initializes at
> > > > 32
> > > >
> > > > How did you check it?
> > > >
> > > >
> > > > Takashi
> > > >
> > > > > On Mar 10, 2014 4:29 PM, "Alan Horstmann" <gineera at aspect135.co.uk>
> > > > wrote:
> > > > >
> > > > > > On Monday 10 March 2014 14:36, Jason Mancine wrote:
> > > > > > > I am still working on trying to get the R16 to work for
> playback.
> > > > > >
> > > > > > > So, the main question is how do I force ALSA to initialize this
> > > > device at
> > > > > > > 24 bit integer?
> > > > > >
> > > > > > Isn't the answer in Takashi's original reply...?
> > > > > >
> > > > > > > >  On Dec 6, 2013 11:25 AM, "Takashi Iwai" <tiwai at suse.de>
> wrote:
> > > > > > > >> Do you mean the 24bit physical size, i.e. each frame is
> packed in
> > > > 3
> > > > > > > >> bytes?  If so, you used a wrong format.
>  SNDRV_PCM_FMTBIT_S24_LE
> > > > is
> > > > > > > >> for 24bit format packed in 32bit frame.  If you need a
> 3-bytes
> > > > frame,
> > > > > > > >> use SNDRV_PCM_FMTBIT_S24_3LE instead.
> > > > > >
> > > > > > Many USB devices have this...
> > > > > >
> > > > > > >                                 .type =
> QUIRK_AUDIO_FIXED_ENDPOINT,
> > > > > > >                                 .data = & (const struct
> audioformat)
> > > > {
> > > > > > >                                 .formats =
> SNDRV_PCM_FMTBIT_S24_LE,
> > > > > >
> > > > > >                                  .formats =
> SNDRV_PCM_FMTBIT_S24_3LE,
> > > > > >
> > > > > > instead.  That would apply for capture also.  Or is that what you
> have
> > > > been
> > > > > > trying?
> > > > > >
> > > > > > Regards
> > > > > >
> > > > > > Alan
> > > > > >
> > > > > _______________________________________________
> > > > > Alsa-devel mailing list
> > > > > Alsa-devel at alsa-project.org
> > > > > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> > > > >
> > > >
> > > [2  <text/html; ISO-8859-1 (quoted-printable)>]
> > >
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