message: channelCount as an input option
  fixes
diff: @@ -12,6 +12,7 @@ export interface ChannelOptions extends ToneAudioNodeOptions {
  volume: Decibels;
  solo: boolean;
  mute: boolean;
  + channelCount: number;
  }
  /**
  @@ -68,6 +69,7 @@ export class Channel extends ToneAudioNode<ChannelOptions> {
  pan: options.pan,
  volume: options.volume,
  mute: options.mute,
  + channelCount: options.channelCount
  });
  this.pan = this._panVol.pan;
  this.volume = this._panVol.volume;
  @@ -81,7 +83,8 @@ export class Channel extends ToneAudioNode<ChannelOptions> {
  pan: 0,
  volume: 0,
  mute: false,
  - solo: false
  + solo: false,
  + channelCount: 1,
  });
  }
  