34 lines
1.0 KiB
Scheme
Executable File
34 lines
1.0 KiB
Scheme
Executable File
#! /usr/bin/env mzscheme
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#lang scheme/base
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(require ffi/sndfile)
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;; (require (lib "swindle.ss" "swindle"))
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(define (add-half x y)
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(/ (+ x (* y 0.5)) 1.5))
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(define (repeated-list x n)
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(let loop ([n n] [r '()])
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(if (zero? n) r (loop (sub1 n) (cons x r)))))
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(let-values ([(data meta) (read-sound* "x.wav")])
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(printf ">>> data-length: ~s\n>>> meta: ~s\n" (length data) meta)
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(let* ([data data #;
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(list-of (list (add-half (1st x) (1st y))
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(add-half (2nd x) (2nd y)))
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(x <- data
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and
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y <- (append (repeated-list (list 0.0 0.0) 11025) data)
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and
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i <- 0.1 0.12 ..))])
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(printf "writing to y.wav\n")
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(write-sound* "y.wav"
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;data
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;(append data (reverse data))
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(append data (reverse (map reverse data)))
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`((artist "Eli") (comment "Comment") (title "Title")
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(date "1/1/1999") (software "mzscheme")
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,@meta))))
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