Now that the OB-6 manual is out there it's easier to see how the OB-6 differs in functionality to the Prophet-6. I'm wondering which aspects of the OB-6 functionality and firmware might be portable to the Prophet-6 at some time. Obviously, anything related directly to the voice cards is not possible and out of the question.
1. Program selection with the Increment/Decrement buttons to step forward and backwards. (Pretty sure this is done and was in the pulled firmware update)
2. Unison voicing with pan spread to place odd-numbered voice centrally.
3. Unison voicing slop (detune) to detune voices from each other separate to slop, so you can keep slop stable (or off) but have a wide detuning of multiple unison voices.
4. New effects: Flanger 1, Flanger 2, Phase Shifter 3, Ring Modulator. I can understand that perhaps the two Tom Oberheim specific effects (Phase Shifter 3 and Ring Modulator) might want to be kept unique to the OB-6 but I would love to see the two Flangers make it to the P-6.
5. LFO to PW1 or PW2 (or both). Not sure there's an intuitive way to do it from the UI but perhaps hold down the PW 1+2 button and select from PW1, PW2 and 1+2 using Increment/Decrement. Similar to the way Key Mode or Unison voices is set.
Anything else I've missed?