Tutorials and Topics - Peabody Computer Music

Tutorial 4Fundamentals:Routing signalsReceiving a different signalThe remaining portion of the tutorial patch exists simply to demonstrate the use of the setmessage to the receive~ object. This is another way to alter the signal flow in a network.With set, you can change the name of the receive~ object, which causes receive~ to get itsinput from a different send~ object (or objects).Giving receive~ a new name changes its input• Click on the message box containing set sawtooth. Both of the connected receive~ objectsnow get their signal from the phasor~ in the lower-right corner of the window. Clickon the message boxes containing set outL and set outR to receive the sinusoidal tones onceagain. Click on ezdac~ to turn audio off.SummaryIt is possible to make signal connections without patch cords, using the MSP objectssend~ and receive~, which are similar to the Max objects send and receive. The set messagecan be used to change the name of a receive~ object, thus switching it to receive its inputfrom a different send~ object (or objects). Signal flow can be routed to differentdestinations, or shut off entirely, using the gate~ object, which is the MSP equivalent ofthe Max object gate.The cycle~ object can be used not only for periodic audio waves, but also for sub-audiocontrol functions: you can read through the waveform of a cycle~ object at any rate youwish, by keeping its frequency at 0 Hz and changing its phase continuously from 0 to 1.The line~ object is appropriate for changing the phase of a cycle~ waveform in this way,and phasor~ is also appropriate because it goes repeatedly from 0 to 1.The sig~ object converts a number to a constant signal; it receives a number in its inletand sends out a signal of that value. This is useful for combining constant values with82