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82 QuadraSynth Reference Manual
Tracking Generator
The Tracking Generator is used to scale a modulation source. For example, normally
you could modulate the Amp (volume) of a sound using velocity; the harder you
play, the louder the sound gets. The amount of change in volume is equal to the
change in velocity; this is called linear control. If instead, however, you set the
Tracking GeneratorÕs input to ÒvelocityÓ, and then routed the Tracking Generator to
the Amp (using the Mod function), you can make your own customized "map" of the
control velocity has over the soundÕs level.
The Tracking Generator divides the range of the input into 11 points (0Ñ10), each of
which can be set between 0 and 100. If you boost the value of one of the lower points,
you make the input more sensitive in its lower register. By creating a non-linear
curve using the velocity example above, you can scale the velocityÕs control over the
soundÕs volume just the way you want.
0
100
POINTS: 01234567891
0
LINEAR
0
100
POINTS: 01234567891
0
NON-LINEAR
Tip: The Tracking Generator can be used to turn a variable control, such as the Mod
Wheel or velocity, into a switch by setting all of the points to 0 except for point 10.
Only near the maximum input will anything other than 0 come out of the Tracking
generator. You can patch the Mod Wheel somewhere else in addition to the Tracking
Generator, giving you gradual control of one function with the full range of the Mod
Wheel, while switching on a second function only at the top of the wheel.
However, the Tracking Generator interpolates between steps; this is sort of like
playing Òconnect the dots.Ó In other words, the Tracking Generator does not step
directly from one point to the next, but ramps from point to point.