The issue I’m having is similar to some who have posted on here but not exactly the same. It may be symptomatic of the same problem, however. So far I haven’t come across a definitive answer on these forums. Updated all relevant software to its newest version (Logic, macOS Monterrey, Scaler 2) and ever since then, any time I create more than one track with an instance of Scaler 2 Midi FX on it, the audio routes to the newest track and the original track is silent. This issue follow suit as you create more tracks with Scaler Midi FX on it within the same project. If I delete the newest track, the audio does not revert back to the original, the original is just silent with no audio routed through it. Additionally, Logic will randomly crash when two or more instances of Scaler are open. Previously, I was able to create as many tracks with instances of Scaler on it as I wanted, all played simultaneously, audio was routed correctly, and there were no crashes.
I’m wondering what happened here. Some people say it’s an issue with Apple, whether it’s Logic or Monterrey or both. That may be the case but I did test out another Midi FX chord generator (Xfer Record’s Cthulu) and ran multiple instances of it and it worked just fine.
My system:
MacBook Pro 13-inch 2017
2.5 GHz Dual-Core Intel Core i7
16 GB 2133 MHz LPDDR3
Scaler 2.5.0
Logic Pro X 10.7.2
macOS Monterrey 12.0.1