How to make an "AudioTrack"?

After learning of some time, I recognize that AudioSourcePlayer can play the sound from hard drive, AudioProcessorPlayer can make a AudioProcessor added to AudioDeviceManager .
And AudioProcessorGraph can make multiple plug-in chain , but I do not understand is how to:
Get a waveform file playback, and add a chain of some AudioProcessor to process it ?
like any AudioTrack in a DAW? I dont know how to make it because I noticed that
if a AudioProcessorPlayer and a AudioSourcePlayer added to
AudioDeviceManage by using addAudioCallback () function,
they are parallel rather than serialthe …