Hi Carl!
On Fri, 07 Feb 2003, Carl Lee wrote:
> Help ice1712/envy24 experts!
>
> Below is my current asound.conf file (thanks to Steve
> Mercier). It defines 4 different stereo input
> channels for A/D recording. I noticed that if I
> attempt to record on 4 channels simultaneously (4
> different threads of course) only 1 channel will
> record, the other 3 channels/threads will block.
>
> I'm pretty sure the ice1712 chipset will allow
> simulataneous multi-channel recording given the
> software driver supports it.
>
> So does the alsa ice1712 driver support this? Has
> anyone gotten this to work? Do I have to modify the
> asound.conf file. Please advise. Thanks.
>
>
> pcm.ice1712 {
> type hw
> card 1
> device 0
> }
>
> pcm.channel1 {
> type plug
> ttable.1.0 1
> ttable.1.1 1
> slave.pcm ice1712
> }
> pcm.channel2 {
> type plug
> ttable.1.2 1
> ttable.1.3 1
> slave.pcm ice1712
> }
>
> pcm.channel3 {
> type plug
> ttable.1.4 1
> ttable.1.5 1
> slave.pcm ice1712
> }
>
> pcm.channel4 {
> type plug
> ttable.1.6 1
> ttable.1.7 1
> slave.pcm ice1712
> }
>
i just found out that the following works:
--- snip ---
pcm.ice1712 {
type hw
card 0
device 0
}
pcm.channel1 {
type plug
ttable.0.0 1
ttable.1.1 1
slave.pcm ice1712
}
pcm.channel2 {
type plug
ttable.0.2 1
ttable.1.3 1
slave.pcm ice1712
}
pcm.channel3 {
type plug
ttable.0.4 1
ttable.1.5 1
slave.pcm ice1712
}
pcm.channel4 {
type plug
ttable.0.6 1
ttable.1.7 1
slave.pcm ice1712
}
pcm.alltogethernow {
type plug
ttable.0.0 1
ttable.1.1 1
ttable.0.2 1
ttable.1.3 1
ttable.0.4 1
ttable.1.5 1
ttable.0.6 1
ttable.1.7 1
slave.pcm ice1712
}
--- snap ---
i don't know what this exactly means, but this is my guess:
ttable.0.0 1
first 0 is 'mono-first-channel', second 0 is 'mono channel 1 in', 1 means 'on'
ttable.1.1 1
first 1 is 'mono-second-channel', second 1 is 'mono channel 2 in', 1 means 'on'
... and so on...
hmm does this make sense? ;)
this is the spdif channel(s):
ttable.0.8 1
ttable.1.9 1
ok, then it should be possible to record each stereo input with:
$ arecord -D channelN -f cd mixdown.wav
and finally, record all 8 mono inputs (or 4 stereo):
$ arecord -D alltogethernow -f cd mixdown.wav
(of course you have to switch to CAPTURE on alsamixer and set the
volumes/pan for each channel (or with envy24control, but it cant set the
CAPTURE flag))
erm ok here is my envy24control settings:
1. Patchbay/Router:
'H/W Out 1 (L)' == 'Digital MIX L'
'H/W Out 2 (R)' == 'Digital MIX R'
'S/PDIF Out (L)' == 'Digital MIX L'
'S/PDIF Out (R)' == 'Digital MIX R'
2. Monitor Mixer:
first i turned off all the 'L/R Gang' because i want real stereo ;)
PCM OUT 1: LEFT=96 and RIGHT=0
PCM OUT 2: LEFT=0 and RIGHT=96
[...rest outs unused...]
H/W In 1: LEFT=96 and RIGHT=0
H/W In 2: LEFT=0 and RIGHT=96
H/W In 3: LEFT=96 and RIGHT=0
H/W In 4: LEFT=0 and RIGHT=96
H/W In 5: LEFT=96 and RIGHT=0
H/W In 6: LEFT=0 and RIGHT=96
H/W In 7: LEFT=96 and RIGHT=0
H/W In 8: LEFT=0 and RIGHT=96
S/PDIF In 7: LEFT=96 and RIGHT=0
S/PDIF In 8: LEFT=0 and RIGHT=96
thats it.
now i was able to record stereo wav files and play them correct.
i don't really understand why there is a "right/left" channel for each mono
input channel. maybe jaroslav could explain it someday...
BTW: i'm using a STAUDIO DSP24 with ADC&DAC2000 C-Port
this one: http://www.staudio.com/cwb-data/data/ridi/STA_DSP2000.JPG ;-)
ciao,
Walter Meister
-------------------------------------------------------
This SF.net email is sponsored by:
The Definitive IT and Networking Event. Be There!
NetWorld+Interop Las Vegas 2003 -- Register today!
http://ads.sourceforge.net/cgi-bin/redirect.pl?keyn0001en
_______________________________________________
Alsa-user mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/alsa-user
