KVR Audio

PHY6 wrote: Tue Jan 05, 2021 4:39 pm The Ob 6 & Prophet 6 have just received an MPE update...fantastic !!!

Current issues with beta OS 1.6.4:

• Pitch bend range seems to be stuck on just under 1 semitone, regardless of panel setting.

• Sending CC to osc 2 level or PW results in non-polyphonic behaviour:
  i.e. all voices respond to a single voice's CC

• Grittiness to the sound when CCs are flowing; some CCs worse than others:
  i.e. y-axis --> osc 1 PW

The grittiness sounds like anti-aliasing of the CC data which needs smoothing/filtering, though I guess it could be the digital hardware maxing out under unprecedented demands. Hopefully it's aliasing.

Another thing - I know the osc frequency controls are quantised to semitones on the panel. This quantisation is also present when controlling osc freq via CC. It would be nice, if possible, to have the option of smooth sweeping of osc frequency.

Poly pitch bend is not working as expected on my two P6 Desktops.

It seems to offset by a factor of 16.

Roger_Linn wrote: Thu Jan 07, 2021 5:29 pm I've had conversations with Chris at Sequential, who is coding the update, and he thinks the MPE implementation should work pretty well. However, I haven't been able to test it with LinnStrument and a Sequential keyboard. If anyone has both and can report here how well it works, please do. Then I'd add it to the Recommended Sound page MPE listing.

John the Savage wrote: Thu Jan 07, 2021 10:05 pm These are someone else's initial findings, taken from the Sequential/DSI OB-6 forum:

Current issues with beta OS 1.6.4:

• Pitch bend range seems to be stuck on just under 1 semitone, regardless of panel setting.

• Sending CC to osc 2 level or PW results in non-polyphonic behaviour:
  i.e. all voices respond to a single voice's CC

• Grittiness to the sound when CCs are flowing; some CCs worse than others:
  i.e. y-axis --> osc 1 PW

The grittiness sounds like anti-aliasing of the CC data which needs smoothing/filtering, though I guess it could be the digital hardware maxing out under unprecedented demands. Hopefully it's aliasing.

Another thing - I know the osc frequency controls are quantised to semitones on the panel. This quantisation is also present when controlling osc freq via CC. It would be nice, if possible, to have the option of smooth sweeping of osc frequency.

The above person is using a LinnStrument. Of course, I can't speak to whether or not any of this is correct, but I thought it might at least spur a constructive conversation.

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Here's another account from a different person, using a Seaboard with the P-6:

Poly pitch bend is not working as expected on my two P6 Desktops.

It seems to offset by a factor of 16.

Again, obviously, I can't speak to the accuracy of any of this.

Cheers!