import { Note } from '../note/note';
import { ChordQuality } from './chord-quality';
import { IntervalQuality } from '../interval/interval-quality';
export declare class Chord {
    protected _notes: Note[];
    protected _root: Note;
    protected _quality: ChordQuality | undefined;
    protected _seventhQuality: IntervalQuality | null;
    constructor(notes: Note[]);
    get seventhQuality(): IntervalQuality | null;
    protected _update: () => void;
    get quality(): ChordQuality | undefined;
}