22 lines
580 B
Scheme
22 lines
580 B
Scheme
(use-modules (ice-9 binary-ports))
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(include "music.scm")
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; Bitrate is the number time to sample the music function each second
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(define bitrate 8000)
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; Get the music as a list sampled at the bitrate
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(define (play t end) (
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cons (* 1/4 (tri (* t (music t)))) (if (< t end)
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(play (+ t (/ 1 bitrate)) end)
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'()
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)
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))
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; Output the list in the s16 raw audio format
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(for-each (lambda (a) (
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let ((b (modulo (inexact->exact (round (* (+ a 2) 32768))) 65536)))
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cons
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(put-u8 (current-output-port) (modulo b 256))
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(put-u8 (current-output-port) (quotient b 256))
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)) (play 0 4))
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