elias/strudel-docker
1
0
Fork 0
mirror of https://github.com/eliasstepanik/strudel-docker.git synced 2026-01-12 06:08:34 +00:00
Code Issues Packages Projects Releases Wiki Activity

noteToMidi: adjustable default octave

Browse Source 
+ pull out static objects
This commit is contained in:
Felix Roos 2023-07-12 23:32:02 +02:00
parent 81b142704c
commit 58fc786462
1 changed files with 7 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
packages/core/util.mjs
View File

@ -18,14 +18,17 @@ export const tokenizeNote = (note) => {
return [pc, acc, oct ? Number(oct) : undefined];
};
const chromas = { c: 0, d: 2, e: 4, f: 5, g: 7, a: 9, b: 11 };
const accs = { '#': 1, b: -1, s: 1, f: -1 };
// turns the given note into its midi number representation
export const noteToMidi = (note) => {
const [pc, acc, oct = 3] = tokenizeNote(note);
export const noteToMidi = (note, defaultOctave = 3) => {
const [pc, acc, oct = defaultOctave] = tokenizeNote(note);
if (!pc) {
throw new Error('not a note: "' + note + '"');
}
const chroma = { c: 0, d: 2, e: 4, f: 5, g: 7, a: 9, b: 11 }[pc.toLowerCase()];
const offset = acc?.split('').reduce((o, char) => o + { '#': 1, b: -1, s: 1, f: -1 }[char], 0) || 0;
const chroma = chromas[pc.toLowerCase()];
const offset = acc?.split('').reduce((o, char) => o + accs[char], 0) || 0;
return (Number(oct) + 1) * 12 + chroma + offset;
};
export const midiToFreq = (n) => {