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Hi guys,

I have a encountered a serious issue with the Reason Rack Plugin 12.2.2 and Logic Pro X 10.7.1:
When using more than one instance of RRP as MIDI FX plugin there are massive playback issues.

How to reproduce:

1. Create two instruments tracks (e.g. Pads and Drums)
2. Insert a RRP as MIDI FX into track A (insert a Player like Scales and Chords)
3. Track A works perfectly with RRP as MIDI FX
4. Insert another RRP as MIDI FX into track B (insert any Player)
5. From here on things go crazy

• Track A remains silent and does not receive any midi information at all any more
• Track B goes crazy and seems to receive MIDI information from BOTH MIDI FX RRP instances!
• At this point Logic is very unstable. Disabling or even deleting MIDI FX RPP on track B does not fix track A's MIDI FX processing.
• Logic even crashes when stopping pausing playback a few times in this state

Can anyone using Logic Pro X and the RRP reproduce this? Is there any fix for this?
In this state RRP as MIDI FX is unusable for me so no Players any more

I've heard about this problem before. I think it might be specific to 10.7. It seems to work just fine in Logic 10.4. I'm up to four tracks now, all with Players, one with two Players. No problems.

I encountered this exact same issue recently and found a workaround. I wrote a step-by-step here:

https://www.logicprohelp.com/forum/view ... 1&t=160595

Wow I appreciate your effords WxTrax!

This seems to be way more complicated than I thought.
However I wonder what exactly is broken and is it Logic or RRP?

It's something in Logic because the behavior is exactly the same with other 3rd-party MIDI FX plugins like InstaComposer as well.

I'm also on Logic 10.7, but multiple players seem to work fine for me so far. I only use RRP occasionally though. Maybe the bug is configuration-dependent?
I do remember another post reporting something similar.

fwiw I'm still on Big Sur. Are you on Monterey?
I do see multiple reports of issues with MidiFX specific to Monterey (here and here)

Yes, I am on Monterey too…

Thankfully, there seems to be a solution for this issue:

https://forum.scalerplugin.com/t/no-mid ... ey/8498/15

Does it work for you guys? I can't test it atm

https://support.apple.com/en-us/HT203718

MIDI 2.0 Support
The Arpeggiator plug-in now sends the correct note-off messages to third-party Software Instruments and MIDI FX plug-ins when Logic is running in MIDI 2.0 mode.

Adding a second instance of a third-party MIDI FX plug-in to a project no longer causes the track with the first instance to stop playing.


Looks like 10.7.2 update addresses the issue

For me it does't fix the issue.
macOS Monterey 12.1 will be released next week. Let's hope it - or the combination with the recent Logic Pro update - will address the issue.

UPDATE: I felt lucky and installed macOS Monterey 12.1 RC. Together with the recent Logic Pro update everything is working as intended again!

I just tried Logic v10.7.2 with macOS 12.1 and confirm the issue has been resolved for me as well. It now works like you would expect it to.