Paste: how to modify this to play music?

TUPLE: noise-generator ;

M: noise-generator generator-audio-format
    drop 1 16 8000 ;
M: noise-generator generate-audio
    drop
    4096 [ -4096 4096 [a,b] random ] short-array{ } replicate-as
    8192 ;
M: noise-generator dispose
    drop ;

:: audio-test ( -- )
    0 :> i!
    f 4 <audio-engine> :> engine
    engine start-audio*

    engine T{ audio-source f { -1.0 0.0 0.0 } 1.0 { 0.0 0.0 0.0 } f } noise-generator new 2
        play-streaming-audio-clip :> noise-clip

    [
        noise-clip source>>
        drop
        engine update-audio
    ] 20 milliseconds every :> timer
    "Press Enter to stop the test." print
    readln drop
    timer stop-timer
    engine dispose ;