Re: quattro multi plugin.

[Takashi Iwai <tiwai@suse.de>]

At Mon, 22 Jul 2002 18:58:56 +0900,
Patrick Shirkey wrote:
> 
> Jaroslav Kysela wrote:
> > 
> > Please, try again. I've just added missing support for 24-bit samples to
> > one alsa-lib's function.
> > 
> 
> Things seem to be getting worse with jack at least. I cannot use the 
> 96000hz setting because that requires jack to have 24 bit support which 
> it doesn't yet. 32 or 16bit are supported.
 
you can use 32bit if it's accessed via plug layer.
alsa-lib converts from 32 to 24bit.
(you need anyway route layer, so the latency stays as before.)

> So If I use the .asoundrc that takashi sent I get an instant hang with 
> only two channels being found and if I use my one I get the same but 
> with four channels being found.
> 
> By instant hang I mean:
> 
> ----
>   jackd -v -d alsa -d q4b
> jackd 0.37.1
> Copyright 2001-2002 Paul Davis and others.
> jackd comes with ABSOLUTELY NO WARRANTY
> This is free software, and you are welcome to redistribute it
> under certain conditions; see the file COPYING for details
> 
> 611 waiting for signals
> creating alsa driver ... q4b|1024|2|48000|swmon
> new client: alsa_pcm, id = 1 type 1 @ 0x8067930 fd = 14
> port alsa_pcm:in_1 buf shm key 0x164398c5 at offset 4096 bi = 0x8066d00
> registered port alsa_pcm:in_1, offset = 4096
> port alsa_pcm:in_2 buf shm key 0x164398c5 at offset 8192 bi = 0x8066d10
> registered port alsa_pcm:in_2, offset = 8192
> port alsa_pcm:in_3 buf shm key 0x164398c5 at offset 12288 bi = 0x8066d20
> registered port alsa_pcm:in_3, offset = 12288
> port alsa_pcm:in_4 buf shm key 0x164398c5 at offset 16384 bi = 0x8066d30
> registered port alsa_pcm:in_4, offset = 16384
> registered port alsa_pcm:out_1, offset = 0
> registered port alsa_pcm:out_2, offset = 0
> registered port alsa_pcm:out_3, offset = 0
> registered port alsa_pcm:out_4, offset = 0
> -- jack_rechain_graph():
> client alsa_pcm: inprocess client, execution_order=0.
> ----
> 
> Then my system locks hard.

hmm...  could you simply try playback of 4 channels?
you can find a sample wav in
	http://www.tsp.ece.mcgill.ca/Docs/AudioFormats/WAVE/WAVE.html

or, try 4 channel recording via aplay.


Takashi


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