import Tone from 'Tone/core/Tone' import Master from 'Tone/core/Master' export default class PianoBase extends Tone { constructor(vol=0){ super(0, 1) this.volume = vol } get volume(){ return this.gainToDb(this.output.gain.value) } set volume(vol){ this.output.gain.value = this.dbToGain(vol) } }