Hello everyone,

Sorry I haven't responded to your last messages yet, but I haven't been inactive because Andrew (PG Music) privately sent me previous versions of Band in a Box for testing.

What emerges is that the stuttering issue with Band in a Box, which I didn't have with my 2020 version, already appears with the 2021 version. And, as you know, the 2021 version is the first version with the 16 additional utility tracks.

Andrew agrees with you that there's a MIDI loop creating a conflict and like you, he also advised me to switch to Local Control Off. ...So I unchecked the "Song," "Style," "Left," "R1," and "R2" parameters in the "Local Control" row of my Clavinova CVP 307 (screenshot below). I don't know if this is the correct way to turn Local Control Off on a Clavinova CVP 307, but in any case, it didn't change the problem: Band in a Box started stuttering again when I played with the MIDI Input Driver enabled.

But I also did an interesting experiment: I tested Band in a Box 2025 by connecting it to a very basic portable piano (Yamaha P45) and playing with the MIDI Input Driver and MIDI Output Driver enabled (screenshot below). And I didn't get any stutters from Band in a Box!

It seems to me that this confirms what you suspected: the problem isn't just with Band in a Box, but with BOTH Band in a Box 2021-2025 and my Clavinova CVP 307.

To move forward, I still have to do the other two tests you suggested (Task Manager and Realband)... but maybe PG Music will find the source of the problem first :-)!

[Image jointe de i.ibb.co]

[Image jointe de i.ibb.co]

Lazy Bird