import sndseq
    word musicSequence // musicSequence(yield, backgroundProc)#0
    word tonePlay      // tonePlay(pitch, duration)#0
    word pcmPlay       // pcmPlay(samples, pagecnt)#0
    predef musicPlay(track, rept)#0, musicStop#0, musicSimple
    predef musicGetKey(yield, backgroundProc)#1,  musicRead(filename)#1
end
