Hi Per
This would be a option, but than I lose a input channel for this. Is there no
way to do that with alsa?
Regards
Peter
From: Per Andersson [mailto:[EMAIL PROTECTED]
Sent: Dienstag, 07. Oktober 2008 00:37
To: BILLEK Peter
Cc: [email protected]
Subject: Re: [Alsa-user] Record output and input channel to one stereo wav
file
Hi Peter
Looping back the output signal to an unused input channel
will give you perfect sync.
Regards
Per Andersson
Artifex software
Sweden
----- Original Message -----
From: "BILLEK Peter"
To: [email protected]
Subject: [Alsa-user] Record output and input channel to one stereo wav file
Date: Mon, 6 Oct 2008 16:20:17 +0200
Hi.
I am using a M-Aduio Delta 1010, with a setup that I have 8 single
input/output channels. That works great with ALSA, and I can record and
playback simultaneous on all channels.
What I want to do, and up till now not found a solution for, is to record
one output channel and one input channel simultaneous to a stereo file.
The use case for this is, that I want to measure the delay of a external
communication system in an automatic way. So I playback (aplay) a wav sample
out off channel 1, send it via my external communication system and record it
back via channel 2 (arecord).
This will end up in 2 none correlated files. Want I want to have is a device
where I can record a stereo file (arecord -D out_in_mix ...) that will have
channel 1 output (left) and channel 2 input (right) of my Delta 1010 in it
OUT1 ---->---------
| |
| V
REC -<- ----------
Stereo-<- |Com Ext.|
| ----------
| |
| |
IN2 ------<---------
I tried with the dmix and copy plugin, but so far no luck.
Any suggestions are welcome.
Regards
Peter
____________________________________________________
(Ing.) Peter Billek
SYSE / System Engineer
FREQUENTIS AG
Innovationsstraße 1 1100 Vienna, Austria
Phone +43-1-811 50 - 3704
(Mobile +43-664-60 850 - 3704)
Fax +43-1-811 50 - 77 3704
Web www.frequentis.com <http://www.frequentis.com/Internet/>
E-Mail [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>
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DVR 0364797, ATU 14715600
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