At Tue, 8 Jul 2003 14:54:37 -0500,
Ryan Underwood wrote:
> 
> 
> Hi Takashi,
> 
> On Tue, Jul 08, 2003 at 07:37:50PM +0200, Takashi Iwai wrote:
> > > On Tue, Jul 08, 2003 at 07:27:06PM +0200, Takashi Iwai wrote:
> > > > > The results are pasted below -- what is strange is that aplay identifies
> > > > > the file as 11025Hz but apparently the OSS driver thinks it is 8000Hz
> > > > > data.
> > > >  
> > > > ah, i understand.  you cannot cat to /dev/dsp in general.
> > > > if you do this, it's supposed to be 8kHz mono samples.
> > > 
> > > Hmm, limitation of the ad1848 driver, of ALSA OSS emulation, or OSS API?
> > 
> > IIRC, it's the definition of this OSS device.
> > well, i'm not sure this is officially so.
> > but at least, /dev/audio is supposed to be in these formats, and we
> > initialize /dev/dsp as well.
> > 
> > btw, for testing the OSS emulation, you can try play command included
> > in sox package.
> 
> You are correct, play works correctly but catting does not.  It seems,
> however, that many OSS drivers support cat a wav file directly to /dev/dsp,
> and do the detection of the format parameters internally.  I guess this is not
> required by the OSS specification?

really do _many_ oss drivers support these features?
i've never thought of that...


Takashi


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