Call Recordings Dual Channel

[comtech]

TIP: Merging mono call recordings into stereo

System: Trixbox 2.2 CE with FreePBX 2.5.x, runs Asterisk 1.2.x After I read about FreeSWITCH’s ability to record calls in stereo, with the inbound leg as one (maybe left) channel, and the outbound leg as the other (maybe right) channel), I wanted to replicate it with my system. Turns out, Asterisk 1.2 uses MixMonitor to mix recordings after the call is done. MixMonitor uses res_monitor.o for this, which actually calls soxmix. Checking the sox documentation on my system revealed that I did not…