Originellement posté par MarioD
If I read this right your Clavinova is a sound source for only MIDI, thus audio is being played by something else, Maybe an audio interface, i.e. soundcard? If that is correct there is one thing you can try that may indicate where the problem is and that is use the BiaB Coyote WT for the MIDI sounds (I know they will not sound anywhere as good your your Clavinova) and turn off your Clavinova. Listen carefully. Do you still hear the piano? If yes then the problem is with BiaB; if it is sending MIDI the CoyoteWT will play it. If not then the Clavinova is reading the MIDI file and playing said piano part.
Good luck

Thank you for this good idea, Mario D !

I took a little time to test it because I haven't had the same problem for two days.

So, to try to reproduce the problem (😊!), I assigned the underlying MIDI of my Utility RealTrack "Guitar 2" to channel 3 (I had previously set it to "Do not re-route"). But still no problem.

So, I looked at which MIDI channel the underlying MIDI of the "Utility" tracks is assigned to by default, and since it's channel 1, I assigned the underlying MIDI of my Utility RealTrack "Guitar 2" to channel 1. And there, the problem again: I hear the piano along with the guitar!

So, I ran your test :in the MIDI/Audio Drivers Setup window, I abandoned my digital audio interface and I chose Use VSTi/DXi Synth, with the default synth offered by BiaB (Coyote WT). And there: no piano along with the guitar!

So the problem could be the Clavinova?! Probably like with the previous issue I reported on the forum ("Band in a Box 2025 stutters when I play MIDI").

But why didn't I have any of these problems with BiaB 2020? Personnally, I'm leaning towards a problem related to the relationship between BiaB 2025, my Windows 10 PC, and my Clavinova, i.e., it could be a problem related to both BiaB 2025 and/or the PC and/or the Clavinova: some sort of incompatibility related to a change in MIDI handling in BiaB 2025 with Windows 10 and/or the Clavinova.

So, I'm wondering if I shouldn't abandon the Clavinova as a sound generator and switch to VSTis. Advantage: no need to reconfigure Band in a Box if I take my PC to a studio. But disadvantages:
- this requires a lot of PC memory,
- I don't know of any multi-instrument VSTi with the sound quality of the Clavinova at a reasonable price (I bought the Garritan JABB3, and I'm very disappointed),
- it takes longer to switch between instruments in BiaB (unless I'm mistaken, there are no good pre-mapped multi-instrument VSTi in GM), ...

If you have any advice for me regarding VSTi options to equip Band in a Box 2025 (mainly with "jazz" instruments), I'm all ears 😊!

Best.

Lazy Bird