ref: b8dbe6d8b0aecb09d12436cd2c3585b1bc982b93 dir: /bin/2mp3/
#!/bin/rc play -o /fd/1 >[2]/dev/null |\ audio/pcmconv -i s16r1c1 -o S16r1c1 |\ audio/mp3enc -r -v -q 0