MIDI interface problem and solution

Hey, previously I wrote a question in forums asking for help with multi-MIDI-setup where some MIDI outputs didn't work. See thread Emagic AMT8 Midi IN works for all stacked… - Apple Community


In short, I have four AMT8 MIDI interfaces stacked together + MOTU microlite and some other MIDI Devices.


However, in LOGIC specifically there issue is an issue that once the certain track threshold is reached, MIDI output won't work.

Lets say I have 64 audio tracks, then 192 midi tracks. In this scenario, Logic won't output MIDI to MIDI tracks 128 onwards.


Solution to this is to add MIDI tracks FIRST in the arrangement, then all MIDI outputs work. I am not 100% sure about the track count, but do your MIDI first, then everything else if your project has multiple midi tracks.


It seems to be some kinda bug/limitation in their code. I thought to post this here in case someone else is experiencing the same issue with multiple MIDI instruments.


MacBook Pro 16″, macOS 12.7

Posted on Sep 16, 2025 03:13 AM

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MIDI interface problem and solution

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