Music 171 homework 2 (due Jan. 20)
Make a sound with four sinusoidal partials, for instance, at 220, 440, 660, and 880 Hz. When I hit a message box on the patch, the partials should hold these frequencies for three or four seconds. Then, the even-numbered partials should slide together to a new pitch (for instance, from 440 to 375.) You should hear the sound magically split onto two new ones, tuned (in this example) a fifth apart. Both sounds should be harmonic; the original one should have partials at 220 and 660; and the second should have (in this example, 375 and 750 Hz.)

There should be two prominent message boxes (or buttons if you prefer), one that causes the patch to jump to the "initial" frequencies (the harmonic ones) and another that starts the slide into two separate tones. The frequencies of the partials should change in time like this:

and sound like this.

For extra credit, rather than sliding the even partials to a new pitch, give them a vibrato (gradually coming in starting after 3 seconds or so) and then a bit later, make the vibrato fade back out. You should hear the sound split in two, and then fuse back together into one. To sequence the appearance and disappearance of the vibrato, you'll need to use a "delay" object, which you should look up on your own. The result should sound something like this.

back to music 171 main page