Subject: Re: [ecasound] Question about multichannel sound cards
From: Aaron Heller (heller_AT_AI.SRI.COM)
Date: Fri May 16 2003 - 01:03:04 EEST
I'm a novice user and still trying to understand all this. Could you
explain why using jack is better than the following for recording to
multiple files.
ecasound -f:32,4,96000,i -a:1,2,3,4 -i:alsaplugin \
-a:1 -f:32,1,96000 -erc:1,1 -o:track-1.wav \
-a:2 -f:32,1,96000 -erc:1,2 -o:track-2.wav \
-a:3 -f:32,1,96000 -erc:1,3 -o:track-3.wav \
-a:4 -f:32,1,96000 -erc:1,4 -o:track-4.wav
And.... I've been using the following to playback M-S recordings to
L-R (L = M+S, R= M-S). Is there a better way.
ecasound -c -r -b:2048 -z:db \
-a:1 -i:m.wav -ea +100 -erc:1,2 \
-a:2 -i:s.wav -ea:+100 -erc:1,2 -epp:0 \
-a:3 -i:s.wav -ea:-100 -erc:1,2 -epp:100 \
-a:1,2,3 -f:16,2 -o:alsaplugin
Ideally, I'd like to tie the setting of -ea together, under a single
real-time control to compute: L = kM + (1-k)S, R= kM - (1-k)S, where
0.0<k<1.0.
Thanks... Aaron <heller_AT_ai.sri.com>
>>>>> "Kai" == Kai Vehmanen <k_AT_eca.cx> writes:
Kai> On Thu, 15 May 2003, Luis Pablo Gasparotto wrote:
>> Could you tell me how should be command line for recording
>> multiple channels simultaneously with a multichannel soundcard
>> like Delta 1010 with ALSA?
Kai> Two options:
Kai> ecasound -f:32,12,44100 -i alsa,hw:0 -o foo.wav
Kai> ... will record 12ch from the ALSA device. If you want to route
Kai> the individual channels to different files, I recommend using
Kai> JACK, and then:
Kai> ecasound -f:32,1,44100 \ -a:1 -i jack -o foo1.wav \ -a:2 -i jack
Kai> -o foo2.wav \ ... \ -a:12 -i jack -o foo12.wav
Kai> -- http://www.eca.cx Audio software for Linux!
Kai> -- To unsubscribe send message 'unsubscribe' in the body of the
Kai> message to <ecasound-list-request_AT_wakkanet.fi>.
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