Originellement posté par Jim Fogle
A dash behind an audio driver, midi driver or plugin normally means more than one instance of the driver or plugin is loaded and in use. Typically that is not a good thing because in most instances it happens while the operator is trying to get the driver or plugin to work as expected.
-1 is telling you the original CVP-307 driver and a second instance of the CVP-307 driver are loaded at the same time. -2 is telling you there are three instances of the CVP-307 driver loaded at the same time.
There are multiple ways this can happen but, without knowing the steps you took the only approach I can suggest are coarse. The coarse steps would be to navigate to options > Return To Factory Settings All and abandoning your current song project and starting a new song project.
Originellement posté par Simon - PG Music
Originellement posté par Lazy Bird
Band in a Box 2025 doesn't stutter when I select MIDI OFF (obviously!), or KBD & STYLE, or Master KBD, or Song (*)
From the sound of it, the "Song" option seems like it would work best. Does using that make things work as you expected?
Originellement posté par Jim Fogle
-1 is telling you the original CVP-307 driver and a second instance of the CVP-307 driver are loaded at the same time. -2 is telling you there are three instances of the CVP-307 driver loaded at the same time.
Almost correct - the 1- or 2- would have to be at the start of the driver name, not at the end. In this particular case it's because the CVP-307 has multiple internal MIDI interfaces - for what purpose I'm not sure, but:
All (or nearly all) Yamaha keyboards use the same driver. I happen to have an S90 here, and BB detects it as three separate input interfaces and eight separate MIDI outputs! This is because the S90 has expansion slots, and the extra interfaces are used to address those expansions - and I believe some are used for other purposes. Either way, in this case the -1 and -2 are perfectly normal.
Originellement posté par Lazy Bird
PS: Initially, I did not have these two lines CVP-307-1 and CVP-307-2, but only one line CVP-307. Why did these two lines appear and how to return to the initial situation?
My assumption is that you might have originally been using a "generic" MIDI driver rather than the official Yamaha one, as the official one should show two entries for output.
Have you installed the latest official driver from Yamaha? If not, you should install it: https://usa.yamaha.com/support/updates/umd_win64_kbd.html
If so you should uninstall it, then reinstall the latest version.

Hello Simon, hello Jim,

Thanks for your messages.

I got my Dell XPS 18 computer back, the one dedicated to music, and I completely reinstalled Band in a Box 2025.

Although Band in a Box 2025 has been reset to factory settings, I still have two CVP 307s appearing in Options, MIDI/Audio Driver Setup, and MIDI Output Driver when I connect the piano directly to my Dell XPS 18, even though I have the latest version of the official Yamaha driver (which I downloaded from the Yamaha website and installed when I started testing by connecting the piano directly to the computer).

But the issue no longer arises for me because I've returned to my initial installation with the piano connected to the computer via my Roland EX Duo Capture EX digital audio interface (screenshot below).

And now that I've set my Clavinova CVP 307's MIDI to Master Keyboard, I can use Band in a Box 2025 with the MIDI Input Driver enabled without any stuttering issues.

So, I consider the problem raised by my initial question solved for me 😊!

[Image jointe de i.ibb.co]

Lazy Bird