Chers Messieurs
Thank you for your answers, I finally did a fresh install of my pc and I'm now on Windows 11 (which doesn't change the problem) I have an Asus H470, Intel i7 2.9 and 32GB RAM with SSD, I normally use Reason 12 with an Akai Midimix + Akai MPKmini and Nektar's Beatstep or Aura (I bought the latter thinking the Beatstep was the culprit).
My windows is really basic, apart from the sound card and the NVDIA panel, there are no application processes running. I tried to see the greedy processes in the background but nothing alarming. I looked with the "LatencyMoon" application but I don't see too much problem. What would be my solutions other than Windows 11? Would a USB HUB help? An external midi clock?
I have Tested with Reason 10, Ableton 11, and Demo version opf Cubase and Reaper .. same problèms ..
With midi view, on 1/4 and 4/4 here are the results, each time there is 1rms more or less
3,03:43:18.675,out,Note on C3 Velocity 64,1,64,90 3C 40
18,03:43:18.973,out,Note off C3 Velocity 64,1,64,80 3C 40
29,03:43:19.174,out,Note on C3 Velocity 64,1,64,90 3C 40
44,03:43:19.473,out,Note off C3 Velocity 64,1,64,80 3C 40
55,03:43:19.674,out,Note on C3 Velocity 64,1,64,90 3C 40
70,03:43:19.973,out,Note off C3 Velocity 64,1,64,80 3C 40
81,03:43:20.174,out,Note on C3 Velocity 64,1,64,90 3C 40
96,03:43:20.473,out,Note off C3 Velocity 64,1,64,80 3C 40
107,03:43:20.674,out,Note on C3 Velocity 64,1,64,90 3C 40
122,03:43:20.973,out,Note off C3 Velocity 64,1,64,80 3C 40
133,03:43:21.174,out,Note on C3 Velocity 64,1,64,90 3C 40
148,03:43:21.473,out,Note off C3 Velocity 64,1,64,80 3C 40
159,03:43:21.674,out,Note on C3 Velocity 64,1,64,90 3C 40
174,03:43:21.973,out,Note off C3 Velocity 64,1,64,80 3C 40
185,03:43:22.173,out,Note on C3 Velocity 64,1,64,90 3C 40
Many thanks for your help