Music 171 homework 5

Practice with abstractions: this assignment is to build an additive synthesis instrument that can imitate the Hammond organ sound. The Hammond organ had a set of eight "drawbars" (sliding potentiometers) that set the amplitudes of the first eight partials (harmonics) of the output tone. (There were lots of other features as well, but this is the one of interest here.) Your patch need not be polyphonic (it should be designed only to play one note at a time) but you should use the abstraction mechanism to make the eight overtones (each copy of the abstraction should make one of them).

Two novel features are, first, being able to use a "$" sign inside an object box to differentiate between the harmonics; and using the "moses" object to allow pitches below 10 (for example) to simply turn the sound off, so that you can make sequences with rests in them.

Your successful patch should sound like this.

To make the patch:

Make an on/off control (to start/stop the sequencer and the usual output level control, and make a zip archive of the main patch and the abstraction together (preferably in a directory with your name in the directory name to make it easy to find once unzipped).

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