So by using the THRU track I can hear my incoming MIDI being played on the DLSMusicDevice piano for the thru track. - and by selecting the midi channel number I can redirect the MIDI to one of the BIAB tracks.

But this only seems to work for the built in DLSMusicDevice instruments.

Currently I have a pure MIDI style loaded - apart from the drums. And I can redirect incoming midi to the bass by setting the THRU to ch 2.

But I have a plugin on my MELODY channel ( SynthMaster One ) and when I try to redirect the THRU channel to the midi channel assigned to MELODY it doesnt play the plugin synth.

However - as i said - it records midi fine and plays it back on synth master.

Also - this seems a pretty naff way of directing incoming MIDI to an instrument on a tracks.

Surely - like in typical sequencers - simply by selecting the track - "ARMING" it.... one should be able to play whatever MIDI instrument is set up for a BIAB track, whether bass, guitar or melody.

what am i missing?

MacOS Sequoia, M4 Pro Mac Mini , 64GB RAM 512GB SSD ,
BIAB, Cubase, Ableton, Logic Pro, SCALER 3, GigLad, AnyTune, Synthesizer V Pro,Vienna Ensemble Pro, Audiofuse, Fractal FM3, KOMPLETE 15, StreamDeck, iReal Pro
White beard, beer belly, bald patch