oops, sir-not-appearing-in-this-film
decouple sample drawing from playback
don't treat deleting all prompt text as an error
basic command interface with write command
more informative dot, and in samples or seconds, not bytes
release /dev/audio on unpause, just keep playing on prompt
redraw: most redrawing only involves reseting view offsets and blanking bg
drawsamps: fix overshooting bin at the end of a batch and simplify some
use default man target from /sys/src/cmd/mkone
add -f: don't read whole file into memory at startup
split source up to facilitate extension