Eliminate these, and code, with varying bitrate, the spectral output on the disc. Reverse the process, expanding low bitrate to 16-bit stereo audio for playback. This introduces many complexities in the type of music that can be created. System acted upon by a driver that serves to mechanically amplify a vibration. In addition, there is always a coupling to the environmental atmosphere.
Musical instruments can consist of more than one of each of the above.
Electrical instruments such as synthesizers. Ask me if you are interested.