Hi everyone,
I’m hoping someone has come across this before.
System
- Windows 11
- Cubase Pro 15 (latest)
- Pro Instruments Bundle 2 activated via Steinberg Activation Manager
The issue only affects Klanghaus and Minimal Sessions. Every other Pro Instruments Bundle 2 library works normally.
What I’ve verified
- Pro Instruments Bundle 2 licence is activated.
- Both libraries are installed.
- Both
.vstsoundfiles exist in:
C:\ProgramData\Steinberg\Content\WIN64
Both libraries are registered in Steinberg Library Manager.
Double-clicking either .vstsound file returns:
“No action was performed! The corresponding VST Sounds are already registered.”
- MediaBay (F5) indexes both libraries correctly.
- Searching for Klanghaus returns 294 loops.
- Searching for Minimal Sessions returns 319 loops.
The problem
Although MediaBay can find the loops:
- No preview waveform is generated.
- Clicking Play in the MediaBay Previewer does nothing.
- Double-clicking a loop does nothing.
Troubleshooting already completed
-
Reinstalled both libraries individually from Steinberg Download Assistant.
-
Confirmed the files exist on disk.
-
Confirmed Library Manager registration.
-
Confirmed MediaBay indexing.
-
Restarted Cubase after reinstalling.
Question
Has anyone with Cubase 15 and Pro Instruments Bundle 2 confirmed that Klanghaus and Minimal Sessions preview and play correctly?
Or is this a known issue with these two legacy loop libraries?
Any ideas would be greatly appreciated.
Thanks!


