INNER CODE UNIT · TypeScript

makeRiff

scribbletune/scribbletune · src/cli.ts:328

const makeRiff = (parsed: ParsedOptions): NoteObject[] => {
  const [root, mode, pattern, subdiv] = parsed.positionals;
  const style = parsed.style;
  if (!root || !mode || !pattern || !subdiv) {
    throw new TypeError('riff requires: <root> <mode> <pattern> <subdiv>');
  }
  const riffScale = scale(`${root} ${mode}`);

  // Style defines sections: each style letter gets one full pattern block.
  // Example: style AABC + pattern x-x[xx] => 4 blocks in A,A,B,C order.
  if (style?.length) {
    const sectionPattern = expandPatternSyntax(pattern);
    const letters = style.toUpperCase().split('');
    const sectionCache: Record<string, NoteObject[]> = {};
    const combined: NoteObject[] = [];
    const clipParams = {
      ...baseClipParams(parsed),
      subdiv: parsed.subdiv || subdiv,

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