Playback sounds half tone lower than written

Where to look?
I’m working on violin piece, so no transpositions in use. Problem is the same when using Noteperformer and the built in HSSE.
The problem is the same when using Midi keyboard and having unplugged it.

Using MacBook Pro 15 Mid 2015 & M-Audio KeyRig 49

Welcome to the forum, Murdvee. Please go to Edit > Device Setup. In that dialog switch to another Sample Rate, wait for 2 seconds and switch back. Close the dialog and play back, still the same problem?

Thanks! That solved the problem! :slight_smile: