Prophet 600 firmware upgrade revisited

The GliGli upgraded firmware uses a patch parameter menu based on the number pad for changing things like vibrato, additional LFO options, envelope shapes etc. Most users find menu diving a nuisance. Since there are more than 10 parameters in the firmware upgrade and only 10 number buttons (0...9) the firmware even needed two "pages" of parameters. A double press of each number accesses an additional parameter. What's more, the location of parameters on the number pad was not completely systematic, e.g. pressing "2" would access the Vibrato Speed, but pressing "2" twice was accessing the LFO Range. A cheat sheet from Synthgraphics (list of parameters and their location) does help, as does the fact that the parameter name is scrolled through the display. Overall, not ideal but still not something one can't live with. The new 2022 firmware version to be published soon has even more parameters so that two pages are not enough. Therefore a different co...

The GliGli firmware (versions 2.0 and 2.1RC3) re-designated the original "Mixer" and "Glide" of the Prophet 600 knobs to control the volumes of oscillators A and B separately. This has the disadvantage that the glide amount needed to go into the - not very user friendly - parameter menu. On the other hand with the GliGli layout, one could (over-)drive both oscillator A and B amps. Personally, I also appreciate the clarity of controlling the two volumes with the two knobs, conveniently positioned next the oscillator sections. There are obviously good reasons for either choice of layout. Now, I have had requests from several users that the original Sequential Circuits layout be brought back. I even had one collector who said he refused the GliGli upgrade because he didn't like the fact the panel control descriptions don't match the control function. And he has a point - not many people got hold of a synth graphics panel overlay to match the GliGli upgrade and ...