6 D: Print information about the current file.
8 H: This is the audio file selector info.
11 D: Start or resume playing.
13 H: Without <num>, starts playing at the current position. Otherwise, the
14 H: corresponding file is loaded and playback is started.
19 H: When paused, it is still possible to jump around in the file via the jmp and ff
23 D: Print list of active tasks.
25 H: Mainly useful for debugging.
30 H: Pressing CTRL+D causes EOF on stdin which also exits para_play.