How can I retrigger the envelope for new MIDI notes right as previous ones end?

Hello. I apologize if I'm using synth terms like "envelope" incorrectly. I'm new to synths, but I love my Prophet 10. I usually use it under MIDI control from Logic Pro, where I use features like the Step Sequencer and piano roll to create chords that the Prophet 10 plays.

However, an issue started last night. Previously, with the step sequencer and midi piano roll, when I created a new MIDI note or chord, my Prophet 10 understood that I wanted to retrigger the envelope. Just to be clear, up until last night, the envelope would retrigger with each MIDI note, even when the new MIDI note came at the exact same spot the previous one ended. Every new MIDI note triggered a new envelope. So, using the step sequencer as pictured, each new "step" would retrigger the envelope. Similarly, when I would play new notes in the piano roll that triggered simultaneously when the old ntoes ended, this would retrigger the envelope. That is what I wanted.

However, something changed last night. Maybe I pressed a button that changed it, I'm not sure. But now, when I use the step sequencer, my prophet does not reset the envelope with each new consecutive note. Even when MIDI is triggering new consecutive notes, the Prophet just plays it as one long note. It's not retriggering anymore, at least when the new note is played simultaneouslyl to the old note ending. I'm not sure if this issue is coming from my Prophet, or from the MIDI commands from Logic. But I cannot seem to figure out how to fix it.

How can I get my synth back to automatically retriggering the envelope each time a key receives a new MIDI note? — even if that note comes exactly as the previous keypress/MIDI note ends.

Thanks in advance. Sorry for the long first post!
« Last Edit: May 13, 2026, 09:34:08 PM by TWEBB »

Several things can reduce the number of available voices.

Possibly one of these:

* Prophet-5 mode enabled, the Rev4 can operate in a dedicated Prophet-5 mode, which intentionally limits the synth to 5 voices to more closely emulate the original Prophet-5 behavior.
* Unison mode enabled, multiple voices are stacked onto one note, making the synth partially or fully monophonic depending on the unison setting.
* Long release times / sustain pedal, voices stay active after keys are released, so new notes can trigger voice stealing.
* Voice stealing, when all voices are occupied, the Prophet reallocates voices dynamically, which can make it seem like fewer than 10 are available.

Possibly, but nor probably:

* A faulty voice card or oscillator — if one or more voices are malfunctioning, you may effectively have fewer usable voices. A common symptom is that every 10th note sounds different, weak, out of tune, or silent.
* Calibration issues — analog voice drift can cause voices to behave unpredictably until auto-calibration is run.
* MIDI problems — stuck MIDI notes, sustain CC messages, or MIDI loops can silently consume voices.
* Extreme Vintage knob settings — high Vintage values can exaggerate voice variation enough that some voices appear unstable or quieter.
* Outdated firmware — some earlier firmware versions had reported voice allocation quirks.

For troubleshooting:

1. Make sure Prophet-5 mode is disabled if you want full 10-voice polyphony.
2. Turn Unison off.
3. Set release to zero.
4. Load a simple/basic patch.
5. Play repeated single notes and listen for a pattern (for example every 10th note failing).

If still problem:
6. Run the auto-tune/calibration routine.
7. Check firmware version via Sequential.

If the same voice fails consistently, it’s usually either a calibration issue or a hardware fault on a specific voice card.

Maybe "Key priority mode" page 45 in the User Guide 1.4 can solve the issue ?    :-\

https://davesmith.wpenginepowered.com/wp-content/uploads/2021/02/Prophet-10-Users-Guide-1.4.pdf

Cheers !
1976 MiniKORG700s // 1979 Prophet-5 rev.2 // 1981 KORG CX-3 // 1984 DX7 // 2020 Prophet-10 rev.4 // MoPho Box // 2 Creamware MiniMax // Creamware Pro-12 // 2 EMU-Proteus 2000 // EMU-Vintage Keys  // Casio VZ-10M // Roland VK-8M // Fatar SL 880 // Roland JUPITER-X // KORG CX-3 V2 //

Thank you both so much for your replies. I have figured out the issue, and it was due to my mistake in the DAW. Turns out the problem was not rooted in the Prophet 10.

When I added new MIDI instruments to the track, such as drums, I accidentally had them sending MIDI signal to my Prophet 10. So the synthy was receiving MIDI signals of varying lengths from multiple instruments, causing erratic envelope behavior.

Whoops.  :-[ Beginner error there on my part. Thanks again for your thorough replies. I appreciate your time, and I'm happy to now be a part of this forum.

Shit happens  ;)  We all learn from our mistakes, hopefully ...  ::)

BTW welcome to the forum  8)

Cheers !
1976 MiniKORG700s // 1979 Prophet-5 rev.2 // 1981 KORG CX-3 // 1984 DX7 // 2020 Prophet-10 rev.4 // MoPho Box // 2 Creamware MiniMax // Creamware Pro-12 // 2 EMU-Proteus 2000 // EMU-Vintage Keys  // Casio VZ-10M // Roland VK-8M // Fatar SL 880 // Roland JUPITER-X // KORG CX-3 V2 //

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Thank you both so much for your replies. I have figured out the issue, and it was due to my mistake in the DAW. Turns out the problem was not rooted in the Prophet 10.

When I added new MIDI instruments to the track, such as drums, I accidentally had them sending MIDI signal to my Prophet 10. So the synthy was receiving MIDI signals of varying lengths from multiple instruments, causing erratic envelope behavior.

Whoops.  :-[ Beginner error there on my part. Thanks again for your thorough replies. I appreciate your time, and I'm happy to now be a part of this forum.

Yeah.  Often DAWs will just route an ALL MIDI by default. 

Of course you could get the same thing as no envelope or a really long envelope if you suddenly changed the button labeled release/hold or the 1 or 2 globals related to that button (which gets pretty confusing).  That button can make your notes only as long as the MIDI gate (sometimes it's a setting on a MIDI device, the gate) and take away the amp envelope's release portion completely.  It can also make the note hold without any trigger at all, indefinitely.
« Last Edit: May 18, 2026, 02:00:37 PM by 558 »
Prophet still sounds good.  With my setup I only need to play like once a month.  First take perfect albums with detailed video of the creation.  Anywhere from 20 minutes to 2 hours or longer.

Thanks 558. The global settings may have been a part of the issue as well. I usually keep my P10 in round-robin voice assignment mode, and it seems like it somehow got set back to the voice-per-key assignment, or whatever the default is. In case I ever get stuck in a similar issue again, I appreciate having this thread of replies to come back to.

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Thanks 558. The global settings may have been a part of the issue as well. I usually keep my P10 in round-robin voice assignment mode, and it seems like it somehow got set back to the voice-per-key assignment, or whatever the default is. In case I ever get stuck in a similar issue again, I appreciate having this thread of replies to come back to.

Yeah or that key priority thing mentioned above.  I was re reading this and that was the first thing I thought of this time.  Guess I'm not on the same page as I was earlier.  That setting is achieved by pressing the program button for 'down' group button for 'up' while holding the keyboard button.  It only has 4 to go thru (up or down) La Lo Lar and Lor for last, low, last retrigger and low retrigger.  Not in that order though I think...Lo, La Lor and Lar
Prophet still sounds good.  With my setup I only need to play like once a month.  First take perfect albums with detailed video of the creation.  Anywhere from 20 minutes to 2 hours or longer.