Trigon-6 Desktop stops responding to MIDI

[synth_coyote]

I bought the Trigon 6 desktop shortly after it was announced, and I've been using it for some time in my home studio. Starting in the past three months, I've had an intermittent issue where it stops responding to MIDI. If I shut it off and turn it on, all is fine, but if I play back MIDI from my DAW once, it won't work on the second playback. The module is connected to a Mac running Sonoma (14.6.1) via USB, and I have multiple other synths connected the same way that do not have any issues (OB-X8, Prophet 10, Tetra, Prophet 12, to name a few). Anyone else seeing anything like this?

I've tried resetting globals, and even re-installing the OS (1.1.2) to no avail. Any suggestions are welcome.

[synth_coyote]

Bumping this thread in case anyone knows what the issue might be. I've since tried alternate connections using MIDI, and also using the USB-host feature of my Mio XL MIDI interface. Same issue regardless of how the Trigon is connected to my computer.

[Quatschmacher]

Contact support@sequential.com

[Autosynther]

This is old and maybe solved.

I have a iConnectivity Mio2 interface and it worked sending sysex from REV2 to computer, but it hung interface completely the other way from computer to REV2.
- so overwhelmed interface is my assumption
- to weak processor inside

Solution was to use a Nektar Midiflex 4, and problem gone. I could send sysex back to REV2. The entire backup.

Also greater risk with this if USB midi directly to synth, if sending application does higher than 32 kbps as midi specs say.

[synth_coyote]

The issue was resolved by Sequential support. It turns out that it's an oddball interaction of Logic Pro's MIDI reset behavior and the Trigon. Pasted the support response below in case it can help anyone else:

Thanks for reaching out to Sequential. Sorry to hear that you've been experiencing MIDI issues with your Trigon 6. I'd be more than happy to help you out.
 
To start, can you confirm which DAW you are using? This sounds like an issue that I have been hearing from Logic 11 users where the transport button is mapped to CC 4 which is our master volume CC.
 
Here's some information I received from another customer:
 
To summarise, one of the default reset messages in Logic (Settings>MIDI>Reset Messages>External MIDI) is 'Control 4: foot control to zero’. So upon pressing stop twice in a Logic project, it sends a zero message to CC4. The conflict is that CC4 in the T6 is assigned to volume via the expression pedal. Therefore the volume was being zeroed out on the T6 and I couldn’t recover it because I don’t have an expression pedal plugged in!
 
The T6 actually has three volume controls: master volume (CC7), preset volume (CC38) and expression volume (CC4). I had tried resetting the master and preset volume but didn’t think of the expression volume because it was effectively out of reach. The solution is simply to uncheck the control 4 reset message in Logic! Though I wonder if it should have a positive default value when the expression pedal is not connected, or it could be re-assignable to something like CC11 expression instead.
 
Let me know if this is in fact what you are experiencing and I can help you more from there if need be.

Thanks to Sequential for their prompt response. This was indeed the issue, and all is well now!