RE: [linux-audio-dev] Two / Three HDSPM Cards?

Joachim,
Your changes allowed me to run the test program! Bravo! However I am now
finding a problem in JACK. When I launch jack I get neither sound nor the
ability to route the any incoming audio. JACK seems to hang. If I launch
JACK with -R for real-time, the jackd watchdog returns a timeout and kills
jack. You said that you had two MADI cards on your system, are you seeing
these same issues? If not, what versions of alsa and jack are you running?

Thanks,
Matt

-----Original Message-----
From: linux-audio-dev-bounces@email-addr-hidden
[mailto:linux-audio-dev-bounces@email-addr-hidden] On Behalf Of Joachim
Deguara
Sent: Friday, June 10, 2005 4:10 AM
To: The Linux Audio Developers' Mailing List
Subject: Re: [linux-audio-dev] Two / Three HDSPM Cards?

problem found. Jack is not the culprit rather alsa. In alsa lib's
pcm_multi.c you need to change the line

char slave_map[32][32] = { { 0 } };
to
char slave_map[64][64] = { { 0 } };

I'll send a patch to the alsa people.
have fun
-joachim

Joachim Deguara wrote:
> Hi, thre Madi cards in one PC is a great idea. But the real trick is
> getting the CPU to process 192 ins onto 192 outs!
>
> I also saw the typo and I hate hand generating long lists of
> incremented values, which is quite error prone. So I wrote a script
> (attached). I tried it out with our Madi cards. By experementing I
> have found that multi card works with <= 32 channels per card for two
> cards!! So max of
> 64 in/outs. where is this from ?! I had increased the max port count
> to
> 256 but that didn't help.
>
> -joachim
>
> Clemens Ladisch wrote:
>
>> Audio Developer wrote:
>>
>>> bindings.112.slave b;
>>> bindings.112.channel 56;
>>
>>
>>
>> This is the 113th channel.
>>
>>
>>> pcm.hdspm_112 {
>>> type multi;
>>> slaves.a.pcm hdspm_0;
>>> slaves.a.channels 56;
>>> slaves.b.pcm hdspm_1;
>>> slaves.b.channels 56;
>>> bindings.0.slave a;
>>> bindings.0.channel 0;
>>> bindings.1.slave a;
>>> bindings.1.channel 1;
>>> ...
>>
>>
>>
>> The same definition could be written in the following form:
>>
>> pcm.hdspm_112 {
>> type multi
>> slaves.a {
>> pcm hdspm_0
>> channels 56
>> }
>> slaves.b {
>> pcm hdspm_1
>> channels 56
>> }
>> bindings [
>> { slave a channel 0 }
>> { slave a channel 1 }
>> { slave a channel 2 }
>> ...
>> { slave a channel 55 }
>> { slave b channel 0 }
>> ...
>> { slave b channel 55 }
>> ]
>> }
>>
>>
>> HTH
>> Clemens
>>
>
>

-- 
Joachim Deguara				Email: dga@email-addr-hidden
Fraunhofer IDMT, Langewiesener St. 22, 98693 Ilmenau, Germany
Phone: +49 3677/69-4851 		Fax:   +49 3677/69-4399