Hi. The command `pacmd list-cards` lists two sources on audio card 1. They
are shown below.

I need help defining these two sources as inputs to avconv.

   1. 
alsa_output.usb-Focusrite_Scarlett_2i2_USB-00-USB.analog-stereo.monitor/#2:
   Monitor of Scarlett 2i2 USB Analog Stereo
   2. alsa_input.usb-Focusrite_Scarlett_2i2_USB-00-USB.analog-stereo/#3:
   Scarlett 2i2 USB Analog Stereo

My goals is to create a single audio file that contains the stream from
these two sources where they remain synced and one source is one track
(e.g., left) and the other source is the other track (e.g., right). (I'm
recording interviews for podcasting; one side of the conversation is more
important than the other so separate tracks can help editing.)

My first *guess* about how to do this is this simple script:

#!/bin/bash
OUTPUT="audio_`date +%Y-%m-%d_%H%M`"
avconv \
-f alsa -ac 2 -i
<alsa_output.usb-Focusrite_Scarlett_2i2_USB-00-USB.analog-stereo.monitor>
\
-f alsa -ac 1 -i
<alsa_input.usb-Focusrite_Scarlett_2i2_USB-00-USB.analog-stereo> \
-map 0:0 -map 1:0 \
-acodec flac \
-threads 0 \
-y $OUTPUT


I assume I need to replace what is in angle brackets with the correct
notation. I have no idea if the rest of the above script is even close...

FYI, I asked the same question here:
http://unix.stackexchange.com/questions/88067/audio-recording-record-two-sources-simultaneously-merge-into-a-single-2-track?noredirect=1#comment131526_88067
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