Midi problem in complex setup over RTP

[stefanpotiau]

We run ableton for backing tracks, with program changes sent via MioXM to Montage, CP4, Virus TI, Axe FX, SPDSX over RTP network. Each instrument has it's own network. We use screen sharing and multiple Dante channels over the same network cable. Also timecode for lighting is on Dante.
Everything goes perfect until a moment in the timeline where the Montage gets set to it's initial preset, being CFX+EP. At this moment there is no program change programmed. The only thing that is happening at that moment is midi for Axe FX (which is routed to it's own RTP network), some audio tracks and Timecode. I tried Midi monitor and it's all correct. No unwanted midi messages.
Anyone got an idea why the Montage gets initialized? Or whatever is happening to it? Could it be the high frequency timecode that does something to it? Or should I try a different fixed IP adres for the MioXM? I'm out of ideas.
Tnx guys!

[maximejerryfraisse]

Hi @stefanpotiau,

Did you try to plug an other instrument on this RTP line ? To see if it also receive "preset 1" message (or anything else).

Maxime

[MichaelAbletonForum]

I have a similar setup, 3 mio via rtp and a soundgrid network. Never had such an issue with rtp

But my experience is that if the setup is not optimal you can have a lot of unexpected issues. It looks like that you have a high load on your network, you should first try to reduce the overall load and the midi messages.

You should use Network Audio on a dedicated LAN.
Use CAT 5/Cable

You can try this as a first step: If you use midi Timecode with your mioXM and Ableton Live use a dedicated Timecode channel! This will reduce the network load and improves the midi timing and stability.

Example.

Ableton MioXM Setup
Not the best
Synth 1 RTP OUT and Timecode. -> MioXM route to 1
Synth 2 RTP Out and Timecode -> MioXM route to 2
Synth 3 RTP Out and Timecode -> MioXM route to 3

Better:
Synth 1 RTP OUT. -> MioXM route to 1
Synth 2 RTP Out -> MioXM route to 2
Synth 3 RTP Out -> MioXM route to 3
TimecodeMioXM Timecode - MioXM Route to 1, 2 & 3

[stefanpotiau]

We found the problem! Actually, our roadie did. He hands over the keytar (AX-synth) to our lead singer but with the TX button set to Off to not make any accidental sounds. When our singer wants to play, he first has to press the TX button. This action sends a Program change value "1" on ch 5. The keytar plays the MODX which is on ch 5. The Montage is on channel 4, but still it changes to CFX+EP when the TX button is pressed. I solved it by unrouting the keytar to the montage in MioXM, but is still seems weird to me why the Montage changes preset when the keytar sends on a different midi ch.

Anyway, glad it's solved!
Tnx guys!