Since you're saying this isn't an original MacKenzie midi file but another user, the file itself could still be messed up. As I said earlier I have some files in a test folder going back years that I'll play with from time to time just for fun. Or more aggravation, ha. So far no matter what I do they simply will not play correctly and I don't know why. I did the same thing you did, I put them in RB and used every trick I know to manipulate them and got squat.

I was thinking it could be the synth but you initially said you're using the Forte Dxi and we all know it responds to the volume slider just fine. It's some of the other synths like Garritan or Sampletank that don't.

I dunno boss, I would usually ask you about something like this not the other way around...

Bob

Biab/RB latest build, Win 11 Pro, Ryzen 5 5600 G, 512 Gig SSD, 16 Gigs Ram, Steinberg UR22 MkII, Roland Sonic Cell, Kurzweil PC3, Hammond SK1, Korg PA3XPro, Garritan JABB, Hypercanvas, Sampletank 3, more.