import sndseq
    word musicSequence // musicSequence(yield, backgroundProc)#0
    word spkrTone      // spkrTone(pitch, duration)#0
    word spkrPWM       // spkrPWM(sample, speed, len)#0
    predef musicPlay(track, rept)#0, musicStop#0, musicGetKey(yield, backgroundProc)#1
end
