Hi everyone, I am trying to solve a specific MIDI workflow issue between an Elektron Octatrack and the Oxi E16. The issue is that the Oxi strictly requires both Bank Select MSB (CC 0), LSB (CC 32), and Program Change (PC) messages sent together for every preset change, otherwise it acts weird. In…

[image] DiegoC: Correct, that’s why I used the 1-127 range and then Transpose -1 Here’s the version that uses only Note On and Velocity values 1 - 127: 12 PGM Per Bank Note On Only.mhp (679 Bytes)

The timestamps are the same since the events get generated at the same instant, but actually they get buffered at the Midihub’s output port and sent ~1ms apart. Could you upload your latest preset? The issue may be elsewhere too. :slight_smile:

Thanks @resonotter and @Giedrius ! You were right, I had another pipe that was actually duplicating the Program Change, and removing it did the trick… BUT :smiley: I just found out another issue, and this one could be more difficult to fix. So I found out that, not only the CCs are omitted when the…

The Program Change event could be converted to a CC and memorized in another Transform pipe through a virtual mapping, so it can be recalled later, to produce the same Program Change. The most difficult part would be to cleanly trigger the event sequence only once. Probably a oneshot LFO could help…

I’m thinking i could also try to use a trig for this, instead of the Native program change. I could transform Velocity into Program Number and… Maybe note number into Bank? I would prefer to use always the same note, but that doesn’t give me many other options to have both messages in the same trig …

Yeah, so we need a timer (one Shot as @Giedrius hints; probably only need a PWM) triggered by the CC#0. Then if a #PC isn’t received before the timer ends the last LFO value triggers the sequence. Upload your mhp please, @DiegoC

[image] DiegoC: I’m thinking i could also try to use a trig for this, Dunno how trigs work, but yea, maybe. Let’s try to get the native PC working first (just for completeness!) I’ve got some timer presets lying around, I’ll dig one out when I’ve seen what your current work in progress look…

Thanks a lot! About the trigs, they are just note steps in the sequencer that you can parameter lock. Transforming the Velocity of the step into PC works great, i do It for other stuff, but in order to have also bank sent i need to use another parameter that could be locked (so i can use just one …

[image] DiegoC: but in order to have also bank sent i need to use another parameter that could be locked (so i can use just one note instead of 16, which is the amount of banks the Oxi has) So if it’s simplest to stick to one MIDI Channel, I guess your PB is the way to go to get 2 data bytes …

I still need to check something, i’m not sure if when sending two trigs with the same PB, Octatrack also ignores the second one (which It Will be the same issue :grinning_face_with_smiling_eyes:), i think It does with CCs, so probably It does with PB too. For sure It doesnt with velocity

Injecting last known Bank Select (CC 0 / CC 32) before standalone Program Changes (Octatrack workflow)

Midihub Support

DiegoC May 18, 2026, 6:51am 16

Midihub 2026.05.18 08.50.30.mhp (2.8 KB)
here it is - the last two bypassed pipelines were my previous attempts (one of them was the one making it fail before)

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Injecting last known Bank Select (CC 0 / CC 32) before standalone Program Changes (Octatrack workflow)

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