MarioD
It gets stranger..
On my other pc, erased the track completly, re-did the midi, changed instrument to whistle.
Its now fine on the melody track, even when I go back to original pc.

Thanks for your help
Roy


Geekom Mini-pc
Intel i5-8259U
16,0 GB RAM 64-bit Windows 11 pro
Acer V15 Laptop
Intel i5-5257U
16,0 GB RAM 64-bit Windows 10, x64
Acer 5750 Laptop
Intel i3-2310M
6.00 GB RAM 64-bit operating system, x64