Hi Tcheko,

thank you for your answer. I will try the cam.library in 68k version. the thing I forgot to say is that I tested 3 midi interfaces, one very cheap, one at 300 euros and another even more expensive, the result is exactly the same. I work all day but tonight I'll give you an example, it's very interesting. It will be necessary to listen well in the rhythmic, it is there that that shocks when one listens. We feel that the kick is offset from the rest and that the song does not have the same impact. In fact, in USB, it just feels like listening to a non-quantized track. I'm coming back here tonight. It is clear that if we can improve the midi in USB it is the simplest solution but apparently it is a general problem, on all systems, even in 2023 at the age of USB 3 or 4! explanation here:

https://midi.org/midi/forum/4025-jitter-and-latency-usb-firewire-thunderbolt