Poly After Touch and OB-X8

Poly After Touch and OB-X8
« on: April 12, 2024, 01:19:03 AM »
Bought an Korg Keystage 61 (but returned as MIDI 2.0 didnít worked out at expected and the keys were not good) that has a Poly Aftertouch and MPE keyboard. OB-X8 receive external Poly Aftertouch and it worked out at once without any problems.

I thought I would use Poly AT for everything, but it wasnít the case - it works for some few sounds but not the majority of sounds I use.

The next MIDI controller I will buy will be with Poly AT (still there are only some few around but Iím sure it will be more common for new models) as the OX-X8 receives Poly AT. If Poly AT can be set per patch at the controller it would make everything smoother.


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Re: Poly After Touch and OB-X8
« Reply #1 on: April 13, 2024, 09:09:59 AM »
In general all of the aftertouch implementations on Sequential synths have a generic "Aftertouch" amount and it will use Channel or Poly based on what the controlling keyboard sends. That's just kind of how they've done it for a long time and I don't expect it to change. Probably easier to change what type of AT your controller is sending.
Kijimi, Xerxes mk2, OB6D, P6D, Prophet 5D (expanded), OB-X8D, Hydrasynth, Pro 3, Wavestate, MS20D, A4mk2, ARmk2, MC202, Avalon, Syntakt, Octatrack, NLDR, H9000, Digitone, Deckard's Dream mk2, Isi-Nin, Roland System 500 + other Eurorack

Re: Poly After Touch and OB-X8
« Reply #2 on: April 14, 2024, 01:41:02 PM »
I have a vintage Ensoniq SQ-80 with PolyAftertouch and have tried it playing my OB-X8. It works as a polyphonic Aftertouch for the filter (controlling each voice's filter independently) but for controlling the modulation it acts as a channel Aftertouch.

Oberheim OB-X8, Minimoog D (vintage), OB6 (Desktop), Oberheim Matrix-6 (MIDI Controller for OB6), VC340


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Re: Poly After Touch and OB-X8
« Reply #3 on: April 16, 2024, 03:17:02 PM »
Thatís because on the OBX8 and the Prophet rev 4, the LFO is not polyphonic, aka per voice. Then again, controlling LFO with polyAT is kind of missing the point. In a polyAT setting, you want your fingers to become the LFO or the envelope rather than to control an LFO or an envelope.