If one wants to create custom/slightly more complex waveform shapes, is there a preferred GEN routine?
I noticed some that use exponents such as GEN05 only seem to allow either all positive or all negative values but not a combination.
For example, wanted to create a saw forward ramp waveform with an exponential curve from -1 to 1 like the one in this image:
This used:
giExp ftgen 2, 0, 1024, "exp", -2, 2, 0
which is convenient as it allows using mixed values (+, -) as well as 0. But using poscil to play, ex:
aSig = poscil(1, 110, 2)
produces a unipolar audio output. I was able to compensate using:
aSig = poscil(1.8, 110, 2)-.9
where the negative value has to be 1/2 of the amplitude.
Is there an easier method or better GEN, perhaps one that allows multiple values & options (more than one set of values, which GEN"exp" does not)? Especially if one wants to create irregular shapes, something that somewhat mimics transeg, allowing a mix of straight lines and curves (perhaps GEN25)? And best case scenario doesn't require compensating by using negative values after the oscil.
Scott
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