I've been experimenting with AudioSynthWaveformModulated but the documentation is a bit confusing. I would expect it to work similarly to AudioSynthWaveformSineModulated, with just one input for the modulation signal. But the WaveformMod has two inputs, one for frequency/phase and another for shape, as well as additional settings depending on what mode you are using. If I simply use the first input I get the regular frequency modulation I expect -- however I'm not sure what is happening with the other modes/inputs/settings. Is there any additional documentation for this object?