Music 171 homework 4: polyphonic synthesizer

The assignment is to build a polyphonic waveshaping synthesizer. The main point of the exercise is to practice two new concepts: using Pd's abstraction mechanism to manage and sequence four-voice polyphonic synthesis; and making a waveshaping instrument. There are complicated examples of how to do polyphony in the textbook. This one is comparatively simple. it should just play four notes at a time, controlled by a single message that contains a list of the MIDI pitches of the four, like this:

48 52 55 60

To make the patch:

Your successful patch should sound something like this.

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