Finding Hidden parameters
How does one find the hidden parameters in the SY22/TG33?
I purchased (via donation) a great (IMO) SY22 editor from Plompy Software. I was pleasantly surprised to find some interesting features taking advantage of the hidden parameters. Hear are some of the features: Harmonic control (c:m ratio I think), Temperament, Fixed Frequency, C M LFO selection, EG modulator).
I originally became aware of the notion of hidden parameters from Sealed's page regarding the TG33. One intriguing parameter he found was the "alg": 0 = serial, and 1 = parallel (two Carriers) (see YAMAHA TG33: New SoundDiver Editors). He was is also able to do some realtime modulation of the FM parameters (listen to samples at YAMAHA TG33: Sound demo - unfortunately this is not possible with the SY22 because you cannot control a particular parameter via SYSEX, you have to change the parameter and upload the whole voice. This takes too much time to do realtime manipulation). In the case of the TG33, I downloaded the manual with the MIDI specs and I could not locate any information regarding the alg parameter.
So if these parameters are undocumented, how do people find them?