Record from multi channels soundcard

I have installed version 4.2 Zorin OS on my machine.

I use this version is that it was compatible with the program Lush Lisp. Versions 32 and 64 of Zorin 6 did not work with this program due to incompatibility of Lush.

I need to use soundcards with support for multi-channel input and output.

I own ESI Maya 44 USB anda ESI U46DJ soundcards. These soundcards have 4 inputs and 4 outputs.

I've installed the ALSA drivers and with support from Zorin the two soundcards worked on my OS.

I used the Audacity program to test recording on 4 channels. The settings for recording / playback are:

ESI U46DJ:
Driver: ALSA
Output: u46mk2_playback
Input: u46mk2_capture_mic0
Channels: 4

MAYA 44 USB
Driver: ALSA
Output: maya44_playback
Input: maya44_capture_mic0
Channels: 4

Now I need to record only 3 channels (or 4 channels and then only use 3 channels) via command line in Linux.

I'm using the REC (SOX) command as follows:

rec -q -c 4 -t wav -r 44100 tmp.wav trim 0 2

But I can not record 4 channels. I can not make a default setting via control panel sound linux. There is no option to set the number of channels to be recorded.

Only a single channel is recorded. And the data of this channel is reproduced in the other 3. For recording 3 channels only the R and L channels are recorded and the third channel is mute (rec -q -c 3 -t wav -r 44100 tmp.wav trim 0 2)

I request some information on how to make this recording via command line correctly. Or is there some other program I need to install in order to make this recording.

Thanks for help.

Hi,

further to Swarfs suggestion, try out the "Pulse Audio Manager" (paman), see the sound section in the post install guide:

viewtopic.php?f=5&t=2054

Regards Wolfman