internal NoiseChannel(Device device) : base(device) { Envelope = new SoundEnvelope(this); }
internal SquareChannel1(Device device) : base(device) { Sweep = new FrequencySweep(this); Envelope = new SoundEnvelope(this); }
internal SquareChannel2(Device device) : base(device) { Envelope = new SoundEnvelope(this); }