public Mixer(MixerType mixerType) { mMixerType = mixerType; mLines = new MixerLines(); mUserLines = new MixerLines(); mMixerControlChangeHandler = new CallbackWindowControlChangeHandler(PtrMixerControlChange); mMixerLineChangeHandler = new CallbackWindowLineChangeHandler(PtrMixerLineChange); mCallbackWindow = new CallbackWindow(mMixerControlChangeHandler, mMixerLineChangeHandler); DeviceId = -1; }