apologies if i got it wrong but certainly for my external roland synth the reverb was done within the synth itself. does it not work that way with the soft synths in BIAB? - particularly the TTS1. i know the roland had sysex messages to change the reverb type.

i know i can use the reverb plugins with RealTracks but have always assumed that midi synths has their own reverb capability going back to the days when BIAB was all midi

glad the OP got the problem solved - but has BIAB changed the way it copes with reverb on midi tracks since the old days?