Music 171 homework 1
This assignment is to make a Pd patch to play a major triad in
sinusoids, with a smooth on-off control. Suitable frequencies of
three sinusoids to make up a major triad are 440, 550, and 660.
(This is a "perfect triad"; there are other variants).
Your successful patch should sound like this. It should not sound like this .
To make the patch (each of the following steps is worth 2 points
for a total of 10):
- make three oscillators with frequencies 440, 550, and 660.
- Using "+~" objects, make the sum of the three. This will have a
peak amplitude of 3 (too much for making reasonable output).
- set up a multiplier and line~ object to control the amplitude
of the sum.
- make message boxes capable of ramping the amplitude control on
and off. "On" should correspond to an amplitude of about 0.1 to
avoid speaker or ear damage. There should be time values so that
turning on and off doesn't make clicks. Label the buttons "on" and
"off".
- Send the result to a dac~ object (both inlets if you want) to
hear it.
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