import { Note, PitchClass } from '../types.js';
/**
 * Returns an array of notes that represent a chord played on a piano in a certain octave.
 * @param {Array} pitchClasses
 * @param {number} octave Octave for the chord root.
 * @param {number} inversion Whether to invert the chord. 0 - root position, 1 - 1st inversion, 2 - 2nd inversion,
 *     etc...
 * @returns {Array}
 */
export declare function pitchClassesToPianoChordNotes(pitchClasses: Array<PitchClass>, octave: number, inversion?: number): Array<Note>;
/**
 *
 * @param pitchClasses Array of pitch classes that represent a scale.
 * @returns {PitchClass[]}
 * @example
 * const EMajorScale = ['E', 'Gb', 'Ab', 'A', 'B', 'Db', 'Eb'];
 * spellScale(EMajorScale) // => ['E', 'F#', 'G#', 'A', 'B', 'C#', 'D#']
 */
export declare function spellScale(pitchClasses: Array<any>): PitchClass[];