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Merge pull request #1000 from eefano/scale-accidentals

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accidentals in scale degrees
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Felix Roos 2024-03-22 23:41:49 +01:00 committed by GitHub
commit f1d491d52e
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1 changed files with 21 additions and 4 deletions
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25
packages/tonal/tonal.mjs
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@ -186,18 +186,35 @@ export const scale = register('scale', function (scale, pat) {
// legacy..
return pure(step);
}
const asNumber = Number(step);
let asNumber = Number(step);
let semitones = 0;
if (isNaN(asNumber)) {
logger(`[tonal] invalid scale step "${step}", expected number`, 'error');
return silence;
step = String(step);
if (!/^[-+]?\d+(#*|b*){1}$/.test(step)) {
logger(
`[tonal] invalid scale step "${step}", expected number or integer with optional # b suffixes`,
'error',
);
return silence;
}
const isharp = step.indexOf('#');
if (isharp >= 0) {
asNumber = Number(step.substring(0, isharp));
semitones = step.length - isharp;
} else {
const iflat = step.indexOf('b');
asNumber = Number(step.substring(0, iflat));
semitones = iflat - step.length;
}
}
try {
let note;
if (value.anchor) {
if (isObject && value.anchor) {
note = stepInNamedScale(asNumber, scale, value.anchor);
} else {
note = scaleStep(asNumber, scale);
}
if (semitones != 0) note = Note.transpose(note, Interval.fromSemitones(semitones));
value = pure(isObject ? { ...value, note } : note);
} catch (err) {
logger(`[tonal] ${err.message}`, 'error');