One tone higher

Hey there… My A4 seems to do something weird.

I have figured out how to put different tones of the same sound into the sequencer (hold on the keyboard and then… you know). But when I put a note into the sequencer it plays exactly one tone above - for example: I put a C into my sequencer but when I hit play it plays a D.

Does anyone have an idea?

Some transpose trickery I’m assuming.

Any tuning or detuning on OSC 1 or OSC 2?