* Digi96 driver question
@ 2004-05-04 2:43 Anders Torger
2004-05-04 10:48 ` Paul Davis
0 siblings, 1 reply; 6+ messages in thread
From: Anders Torger @ 2004-05-04 2:43 UTC (permalink / raw)
To: alsa-devel
On the page
http://www.alsa-project.org/alsa-doc/doc-php/template.php?company=RME&card=Digi96%
2F8+PAD&chip=FPGA&module=rme96
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 Torger
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Digi96 driver question
2004-05-04 2:43 Digi96 driver question Anders Torger
@ 2004-05-04 10:48 ` Paul Davis
2004-05-04 12:06 ` Anders Torger
0 siblings, 1 reply; 6+ messages in thread
From: Paul Davis @ 2004-05-04 10:48 UTC (permalink / raw)
To: Anders Torger; +Cc: alsa-devel
>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.
--p
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Digi96 driver question
2004-05-04 10:48 ` Paul Davis
@ 2004-05-04 12:06 ` Anders Torger
2004-05-04 15:41 ` Takashi Iwai
0 siblings, 1 reply; 6+ messages in thread
From: Anders Torger @ 2004-05-04 12:06 UTC (permalink / raw)
To: Paul Davis; +Cc: alsa-devel
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.
/Anders
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Digi96 driver question
2004-05-04 12:06 ` Anders Torger
@ 2004-05-04 15:41 ` Takashi Iwai
2004-05-04 17:40 ` Takashi Iwai
0 siblings, 1 reply; 6+ messages in thread
From: Takashi Iwai @ 2004-05-04 15:41 UTC (permalink / raw)
To: Anders Torger; +Cc: Paul Davis, alsa-devel
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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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Digi96 driver question
2004-05-04 15:41 ` Takashi Iwai
@ 2004-05-04 17:40 ` Takashi Iwai
2004-05-04 19:25 ` Anders Torger
0 siblings, 1 reply; 6+ messages in thread
From: Takashi Iwai @ 2004-05-04 17:40 UTC (permalink / raw)
To: Anders Torger; +Cc: Paul Davis, alsa-devel
At Tue, 04 May 2004 17:41:09 +0200,
I wrote:
>
> 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.
it turned out that the entry "snd-rme9652" matches with snd-rme96.
so, it was targeted to another driver...
Takashi
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Digi96 driver question
2004-05-04 17:40 ` Takashi Iwai
@ 2004-05-04 19:25 ` Anders Torger
0 siblings, 0 replies; 6+ messages in thread
From: Anders Torger @ 2004-05-04 19:25 UTC (permalink / raw)
To: alsa-devel
On Tuesday 04 May 2004 19.40, Takashi Iwai wrote:
> At Tue, 04 May 2004 17:41:09 +0200,
>
> I wrote:
> > 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.
>
> it turned out that the entry "snd-rme9652" matches with snd-rme96.
> so, it was targeted to another driver...
Ok great... then I know.
I think the hardware limitation (that is that you run it either in ADAT
or S/PDIF mode, not both at the same time) is stated in the info for
the card when you buy it, so it should not be necessary to have the
same info in the driver page. As long as the hardware is fully
supported there should not be necessary for any further notes.
Well, there actually is one limitation -- the driver does not support
running the card in "multi-stereo device mode", which is a hardware
hack to make the card simulate multiple stereo sound cards (I think it
is to support old Microsoft Windows pcm APIs). ALSA makes such things
redundant though, so I don't think it is a limitation worth mentioning.
There is simply no reason for using the card that way when there is
proper multi-channel support in the pcm API.
/Anders
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^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2004-05-04 19:25 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2004-05-04 2:43 Digi96 driver question Anders Torger
2004-05-04 10:48 ` Paul Davis
2004-05-04 12:06 ` Anders Torger
2004-05-04 15:41 ` Takashi Iwai
2004-05-04 17:40 ` Takashi Iwai
2004-05-04 19:25 ` Anders Torger
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