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author | Anthony Wang | 2022-12-17 18:37:07 -0600 |
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committer | Anthony Wang | 2022-12-17 18:37:07 -0600 |
commit | 3da3a7f6c5ee83373ef4e6e3232cc5a371137e68 (patch) | |
tree | 454427a3f00f9e34e06362f03b3441b825989b19 /lib.scm | |
parent | f11992a8fca36b7be77c7225a0007468bf6a29cb (diff) |
Split into multiple files and rewrite README
Diffstat (limited to 'lib.scm')
-rw-r--r-- | lib.scm | 18 |
1 files changed, 18 insertions, 0 deletions
@@ -0,0 +1,18 @@ +(define (saw t) ( + let ((m (floor-remainder (+ t (/ 1 4)) 1))) + (if (< m 1/2) + (- (* 4 m) 1) + (- 3 (* 4 m))) +)) + +(define (note freq start len) ( + lambda (t) ( + if (or (< t start) (>= t (+ start len))) + 0 + (saw (* freq t)) + ) +)) + +(define (getfreq octave pitch) ( + * 55 (ash 1 octave) (expt 2 (/ pitch 13)) +)) |