Any Logic X users in here? My issue might be an issue with Logic, Mac or USB MIDI and not Yamaha but I thought I'd ask here first... Using Montage 2.0, the latest Logic and OSX versions (High Sierra).
I've connected my Montage to a Macbook Pro using USB (straight basic generic cable into a port, no hubs). I'm trying USB MIDI at first, would like to use the Montage as a tone generator (to continue my unfinished Motif XF sequences there, for instance), but I've run into a few curious issues. I'm not using the Montage as an audio interface yet, it is going through my Yamaha n8 Firewire audio interface / mixer, which in turn is connected to Yamaha HS7 monitors.
1) I'm getting stuck / hanging MIDI notes (random note will sustain) in Logic, using USB MIDI. I usually record in Logic using the looping cycle record function, just as you would do in Motif's Pattern Mode (which I loved!). But using USB MIDI, I'm getting stuck / hanging MIDI notes, usually when the loop resets. Nothing will help except resetting the patch on Montage. I've googled about this and some other people also have this problem with external hardware and USB MIDI, but I haven't found any viable reason or solution.
2) I've set Montage into the "sequence MIDI on a DAW" mode (or however it was phrased) using Quick Setup, meaning that Local is OFF. Now, if I play on the Montage (when a MIDI track is record-"armed" in Logic), I get a weird "flanging" effect as you do if Local is still ON and I'm getting MIDI from two sources...? What am I doing wrong, what setting need to be corrected?