-= terminal control keys =-
[s] or [ ] interrupt/restart playback (i.e. 'pause')
[f] next track
[d] previous track
[b] back to beginning of track
[p] pause while looping current sound chunk
[.] forward
[,] rewind
[:] fast forward
[;] fast rewind
[>] fine forward
[<] fine rewind
[+] volume up
[-] volume down
[r] RVA switch
[v] verbose switch
[l] list current playlist, indicating current track there
[t] display tag info (again)
[m] print MPEG header info (again)
[h] this help
[q] quit
[c] or [C] pitch up (small step, big step)
[x] or [X] pitch down (small step, big step)
[w] reset pitch to zero
}}}
Source: http://forums.justlinux.com/showthread.php?137715-mpg123-control-keys