Tutorials and Topics - Peabody Computer Music

Tutorial 5Fundamentals:Turning signals on and offThis subpatch combines 8 harmonically related sinusoids to create a complex tone inwhich the amplitude of each harmonic (harmonic number n) is proportional to 1 /2 n .Because the tones are harmonically related, their sum is a periodic wave at thefundamental frequency.Wave produced by the patcher harmonics subpatchThe eight frequencies fuse together psychoacoustically and are heard as a single complextone at the fundamental frequency. It is interesting to note that even when thefundamental tone is removed, the sum of the other seven harmonics still implies thatfundamental, and we perceive only a loudness change and a timbral change but nochange in pitch.The same tone, minus its first harmonic, still has the same period• Click on the startwindow message to start audio in the subpatch. Try removing andreplacing the fundamental frequency by sending 0 and 1 to the selector~. Click on stopto turn audio off.SummaryThe startwindow message to dac~ (or adc~) starts audio processing in the Patcher windowthat contains the dac~, and in any of that window’s subpatches, but turns audio off in allother patches. The mute~ object, connected to an inlet of a subpatch, can be used todisable all MSP objects in that subpatch. An enable 0 message to a pcontrol object connectedto an inlet of a subpatch can also be used to disable all MSP objects in that subpatch. (This91