message: setting channelCount to 1 and mode to "explicit"
  fixes issue with std-audio-context and stereo panner
diff: @@ -113,6 +113,11 @@ export class CrossFade extends ToneAudioNode<CrossFadeOptions> {
  this.context.getConstant(1).connect(this._panner);
  this._panner.connect(this._split);
  + // this is necessary for standardized-audio-context
  + // doesn't make any difference for the native AudioContext
  + // https://github.com/chrisguttandin/standardized-audio-context/issues/647
  + this._panner.channelCount = 1;
  + this._panner.channelCountMode = "explicit";
  connect(this._split, this.a.gain, 0);
  connect(this._split, this.b.gain, 1);
  