Windows 10, Cubase 12.0.20.
- Create a new instrument track (Halion Sonic, doesn’t seem to matter).
- Open the instrument.
- Middle C is shown as “C3” on the instrument keyboard (should be C4).
- Close instrument and go to the MIDI editor.
- The vertical keyboard also has the octave labels shifted -1.
I haven’t tested exported MIDI yet, but my guess is this is a labeling issue only. The MIDI events seem to have the right key numbers, it’s just the labels are off.