92 lines
1.6 KiB
C
92 lines
1.6 KiB
C
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// FM Algorithms used by the DX9
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// Excellent write-up:
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// https://gist.github.com/bryc/e997954473940ad97a825da4e7a496fa
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#pragma once
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// Each operator has 4 input gains and one output gain:
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// { 1→, 2→, 3→, 4→, →out}
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// ⮎4→3→2→1→
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#define DX9_ALG_1(feedback) \
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{ \
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{0, 1, 0, 0, 1}, \
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{0, 0, 1, 0, 0}, \
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{0, 0, 0, 1, 0}, \
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{0, 0, 0, feedback, 0}, \
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}
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// ⮎4⬎
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// 3→2→1→
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#define DX9_ALG_2(feedback) \
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{ \
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{0, 1, 0, 0, 1}, \
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{0, 0, 1, 1, 0}, \
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{0, 0, 0, 0, 0}, \
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{0, 0, 0, feedback, 0}, \
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}
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// ⮎4⬎
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// 3→2→1→
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#define DX9_ALG_3(feedback) \
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{ \
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{0, 1, 0, 1, 1}, \
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{0, 0, 1, 0, 0}, \
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{0, 0, 0, 0, 0}, \
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{0, 0, 0, feedback, 0}, \
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}
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// ⮎4→3⬎
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// 2→1→
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#define DX9_ALG_4(feedback) \
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{ \
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{0, 1, 0, 1, 1}, \
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{0, 0, 1, 0, 0}, \
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{0, 0, 0, 0, 0}, \
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{0, 0, 0, feedback, 0}, \
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}
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// ⮎4→3→
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// 2→1→
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#define DX9_ALG_5(feedback) \
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{ \
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{0, 1, 0, 0, 1}, \
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{0, 0, 0, 0, 0}, \
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{0, 0, 0, 1, 1}, \
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{0, 0, 0, feedback, 0}, \
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}
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// 1→
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// ⮎4→2→
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// 3→
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#define DX9_ALG_6(feedback) \
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{ \
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{0, 0, 0, 0, 1}, \
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{0, 0, 0, 1, 1}, \
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{0, 0, 0, 0, 1}, \
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{0, 0, 0, feedback, 0}, \
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}
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// 1→
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// 2→
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// ⮎4→3→
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#define DX9_ALG_7(feedback) \
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{ \
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{0, 0, 0, 0, 1}, \
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{0, 0, 0, 0, 1}, \
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{0, 0, 1, 0, 1}, \
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{0, 0, 0, feedback, 0}, \
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}
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// 1→
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// 2→
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// 3→
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// ⮎4→
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#define DX9_ALG_8(feedback) \
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{ \
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{0, 0, 0, 0, 1}, \
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{0, 0, 0, 0, 1}, \
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{0, 0, 0, 0, 1}, \
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{0, 0, 0, feedback, 1}, \
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}
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