I am having issue sending multiple analogue signal using nidaqmx on a NI card.

I can send multiple signal if I "compile" and then start sending them in one go. What I can't figure out how to do is sending multiple at the same time starting at different moments.

If I try to do it on the same nidaqmx.Task instance, it kind of work, but it reset the first signal and make it start again at the same time as the second one start. When I try to create 2 instance of nidaqmx.Task it doesn't work, I get an error saying The specified ressource is reserved. The operation could not be completed as expected