ref: 1df4fba2a9c4365a0a35f46d1f41f560985a0908 dir: /bin/2opus/
#!/bin/rc l=(--bitrate 128) if(~ $1 -l){ l=() shift } play -o /fd/1 >[2]/dev/null |\ audio/opusenc --music --downmix-stereo $l