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Merge pull request #1237 from daslyfe/origin/daslyfe/subcycle

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onSubCycle function for "step sequencer" style rhythm notation
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Jade (Rose) Rowland 2025-01-15 23:55:46 -05:00 • committed by GitHub
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22
packages/core/pattern.mjs
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@ -3112,3 +3112,25 @@ export let xfade = (a, pos, b) => {
Pattern.prototype.xfade = function (pos, b) { Pattern.prototype.xfade = function (pos, b) {
return xfade(this, pos, b); return xfade(this, pos, b);
}; };
/**
* creates a structure pattern from divisions of a cycle
* especially useful for creating rhythms
* @name beat
* @example
* s("bd").beat("0:7:10", 16)
* @example
* s("sd").beat("4:12", 16)
*/
const __beat = (join) => (t, div, pat) => {
t = Fraction(t).mod(div);
div = Fraction(div);
const b = t.div(div);
const e = t.add(1).div(div);
return join(pat.fmap((x) => pure(x)._compress(b, e)));
};
export const { beat } = register(
['beat'],
__beat((x) => x.innerJoin()),
);

18
test/__snapshots__/examples.test.mjs.snap
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@ -954,6 +954,24 @@ exports[`runs examples > example "bank" example index 0 1`] = `
] ]
`; `;
exports[`runs examples > example "beat" example index 0 1`] = `
[
"[ 0/1 → 1/16 | s:bd ]",
"[ 1/1 → 17/16 | s:bd ]",
"[ 2/1 → 33/16 | s:bd ]",
"[ 3/1 → 49/16 | s:bd ]",
]
`;
exports[`runs examples > example "beat" example index 1 1`] = `
[
"[ 1/48 → 1/12 | s:sd ]",
"[ 49/48 → 13/12 | s:sd ]",
"[ 97/48 → 25/12 | s:sd ]",
"[ 145/48 → 37/12 | s:sd ]",
]
`;
exports[`runs examples > example "begin" example index 0 1`] = ` exports[`runs examples > example "begin" example index 0 1`] = `
[ [
"[ 0/1 → 1/2 | s:rave begin:0 ]", "[ 0/1 → 1/2 | s:rave begin:0 ]",