Oooooh. Sorry!
Now i understand, I think its a purely display bug. What i think is happening is this:
- The piano roll scrolls at the correct speed
- The sequencer goes at 1/2 the speed it should
I totally think this is a bug in the scaling. You probably have a 4K monitor which i dont test too often.
Could you (just for a test) set your Windows desktop scaling to 100%? (If you dont want to change your whole desktop, you can force 100% scaling in the FamiStudio option, click on the "gear" icon on the toolbar).
If it fixes it, please send me an email at famistudio@outlook.com and I'll have you test an updated version (on continuera en francais!).
-Mat