Re: Digi96 driver question

[Takashi Iwai <tiwai@suse.de>]

At Tue, 4 May 2004 14:06:11 +0200,
Anders Torger wrote:
> 
> On Tuesday 04 May 2004 12.48, you wrote:
> > >in says under "known bugs":
> > >
> > > - 96kHz and 88.2kHz not accessible via PCM interface
> > >
> > >What does that mean? The card and driver does work in 96 and 88.2
> > > kHz, I know that since I wrote the driver... but if there is some
> > > sort of bug, I'd like to know.
> >
> > anders, i don't know, but it might mean that you can't set the SR to
> > these values using the PCM interface. the hammerfalls are subject to
> > the same limitation in a slightly different way. just a guess.
> 
> You are probably right, I don't really know what the is meant by the PCM 
> interface though. If I can run the card in 96 kHz with
> 
> aplay -r 96000 ...
> 
> (which is possible) does that not mean that the PCM interface supports 
> 96 kHz? Or does "PCM interface" refer to some interface within ALSA I 
> don't know about? I was thinking that "PCM interface" is the collection 
> of snd_pcm_*() functions, but perhaps I'm mistaken?
> 
> The digi96 card runs either in ADAT or S/PDIF mode, it cannot do both at 
> the same time (as the hammerfall can). In ADAT mode, which in the 
> driver is represented as a separate device, it only supports 44.1 and 
> 48 kHz. In S/PDIF mode it supports 32 - 96 kHz. I though perhaps this 
> is what has caused the bug report, but that is only a limitation in the 
> hardware, not a bug in the driver.

maybe it's simply outdated.  i'll remove that one if aplay like above
works.

if you have a better text to explain the driver restriction (either
h/w or s/w one), please send us a patch :)


Takashi


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