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77 lines
2.1 KiB
Plaintext
77 lines
2.1 KiB
Plaintext
---
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title: Microrhythms
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layout: ../../layouts/MainLayout.astro
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---
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import { MiniRepl } from '../../docs/MiniRepl';
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import { JsDoc } from '../../docs/JsDoc';
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import { samples } from '@strudel.cycles/webaudio';
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see https://strudel.tidalcycles.org?zMEo5kowGrFc
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# Microrhythms
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Inspired by this [Mini-Lecture on Microrhythm Notation](https://www.youtube.com/watch?v=or7B6vI3jOo), let's look at how we can express microrhythms with Strudel.
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The timestamps of the first rhythm are `0 1/5 1/2 2/3 1`. We could naively express this with a stack:
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<MiniRepl
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client:idle
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tune={`s("hh").struct(
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stack(
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"x", // 0
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"~ x ~@3", // 1/5
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"~ x", // 1/2
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"~@2 x" // 2/3
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))`}
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/>
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While this works, it has two problems:
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- it is not very compact
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- the durations are wrong, e.g. the first note takes up the whole cycle
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In the video, the duration of a timestamp is calculated by subtracting it from the next timestamp:
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- 1/5 - 0 = 1/5 = 6/30
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- 1/2 - 1/5 = 3/10 = 9/30
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- 2/3 - 1/2 = 1/6 = 5/30
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- 1 - 2/3 = 1/3 = 10/30
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Using those, we can now express the rhythm much shorter:
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<MiniRepl client:idle tune={`s("hh").struct("x@6 x@9 x@5 x@10")`} />
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The problems of the first notation are now fixed: it is much shorter and the durations are correct.
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Still, this notation involved calculating the durations by hand, which could be automated:
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<MiniRepl
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client:idle
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tune={`Pattern.prototype.micro = function (...timestamps) {
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const durations = timestamps.map((x, i, a) => {
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const next = i < a.length-1 ? a[i+1] : 1;
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return next - a[i]
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})
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return this.struct(timeCat(...durations.map(d => [d, 1]))).late(timestamps[0])
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}
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s('hh').micro(0, 1/5, 1/2, 2/3)`}
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/>
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This notation is even shorter and it allows directly filling in the timestamps!
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This is the second example of the video:
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<MiniRepl
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client:idle
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tune={`Pattern.prototype.micro = function (...timestamps) {
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const durations = timestamps.map((x, i, a) => {
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const next = i < a.length-1 ? a[i+1] : 1;
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return next - a[i]
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})
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return this.struct(timeCat(...durations.map(d => [d, 1]))).late(timestamps[0])
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}
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s('hh').micro(0, 1/6, 2/5, 2/3, 3/4)`}
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/>
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with bass: https://strudel.tidalcycles.org?sTglgJJCPIeY
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