Bug in sis7012 driver - or probably I'm doing something wrong ?

Bug in sis7012 driver - or probably I'm doing something wrong ?

[Robert Rozman]

Hi,

I have Asus pundit with sis7012 sound device and alsa 1.0.4 under Suse 9.0.
I've got advice how to use this 6 channel device as 3 stereo channels but
there seems something not to be right (it could be my mistake).

I have /etc/asound.conf :
pcm_slave.sis {
pcm "hw:0"
channels 6
rate 48000
buffer_size 4096  # make these sizes smaller for lower latency
period_size 2048
periods 0
period_time 0
}

pcm.ch12 {
type dmix
ipc_key 47110815
slave sis
bindings.0 0
bindings.1 1
}

pcm.ch34 {
type dmix
ipc_key 47110815
slave sis
bindings.0 2
bindings.1 3
}

pcm.ch56 {
type dmix
ipc_key 47110815
slave sis
bindings.0 4
bindings.1 5
}


pcm.a {
type plug
slave.pcm ch12
}

pcm.b {
type plug
slave.pcm ch34
}

pcm.c {
type plug
slave.pcm ch56
}

pcm.dmixerALL {
type dmix
ipc_key 47110815
slave sis
    bindings.0 0
    bindings.1 1
    bindings.2 2
    bindings.3 3
    bindings.4 4
    bindings.5 5
}

pcm.channelALL {
    type plug
    slave.pcm "dmixerALL"
    ttable.0.0 1
    ttable.1.1 1
    ttable.0.2 1
    ttable.1.3 1
    ttable.0.4 1
    ttable.1.5 1
}
-----------------------------------------

Now I do:

- alsaplayer with mp3 file on device plug:a
- aplay -D plug:ch12 (funny is that plug:a doesn't work)
- everything is ok and mixed properly

- but if I start another alsaplayer on plug:b (probably also plug:c would be
the same), then aplay produces sound that is "interleaved" in short chunks
and also sound from alsaplayer on plug:b is also heard in addition to
original mp3 and aplay sound.

Am I doing something worng or is this somkind of bug or limitation of alsa
driver ?

Thanks in advance,

Robert.




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Re: Bug in sis7012 driver - or probably I'm doing something wrong ?

[Clemens Ladisch]

Robert Rozman wrote:
> I've got advice how to use this 6 channel device as 3 stereo channels but
> there seems something not to be right (it could be my mistake).
>
> I have /etc/asound.conf :
>
> pcm.a {
> type plug
> slave.pcm ch12
> }
>
> pcm.b {
> type plug
> slave.pcm ch34
> }
>
> Now I do:
>
> - alsaplayer with mp3 file on device plug:a

"a" is already defined as a plug plugin on top of "ch12", it's exactly
the same as "plug:ch12".  Adding another plug layer ("plug:plug:ch12")
wouldn't make much sense.

> - aplay -D plug:ch12 (funny is that plug:a doesn't work)
> - everything is ok and mixed properly
>
> - but if I start another alsaplayer on plug:b (probably also plug:c would be
> the same), then aplay produces sound that is "interleaved" in short chunks
> and also sound from alsaplayer on plug:b is also heard in addition to
> original mp3 and aplay sound.

Please try the a,b,c pcm devices without the "plug:" prefix.

Does it work if you run aplay on devices a and b?


Regards,
Clemens




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Free Linux tutorial presented by Daniel Robbins, President and CEO of
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administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click

Bug in sis7012 driver - or probably I'm doing something wrong ?

[Robert Rozman]

Hi,

I have Asus pundit with sis7012 sound device and alsa 1.0.4 under Suse 9.0.
I've got advice how to use this 6 channel device as 3 stereo channels but
there seems something not to be right (it could be my mistake).


Now I do:

- alsaplayer with mp3 file on device plug:a
- aplay -D plug:ch12 (funny is that plug:a doesn't work)
- everything is ok and mixed properly

- but if I start another alsaplayer on plug:b (probably also plug:c would be
the same), then aplay produces sound that is "interleaved" in short chunks
and also sound from alsaplayer on plug:b is also heard in addition to
original mp3 and aplay sound.

Am I doing something worng or is this somkind of bug or limitation of alsa
driver ?

Thanks in advance,

Robert.


I have /etc/asound.conf :
pcm_slave.sis {
pcm "hw:0"
channels 6
rate 48000
buffer_size 4096 # make these sizes smaller for lower latency
period_size 2048
periods 0
period_time 0
}

pcm.ch12 {
type dmix
ipc_key 47110815
slave sis
bindings.0 0
bindings.1 1
}

pcm.ch34 {
type dmix
ipc_key 47110815
slave sis
bindings.0 2
bindings.1 3
}

pcm.ch56 {
type dmix
ipc_key 47110815
slave sis
bindings.0 4
bindings.1 5
}


pcm.a {
type plug
slave.pcm ch12
}

pcm.b {
type plug
slave.pcm ch34
}

pcm.c {
type plug
slave.pcm ch56
}

pcm.dmixerALL {
type dmix
ipc_key 47110815
slave sis
    bindings.0 0
    bindings.1 1
    bindings.2 2
    bindings.3 3
    bindings.4 4
    bindings.5 5
}

pcm.channelALL {
    type plug
    slave.pcm "dmixerALL"
    ttable.0.0 1
    ttable.1.1 1
    ttable.0.2 1
    ttable.1.3 1
    ttable.0.4 1
    ttable.1.5 1
}
-----------------------------------------



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