I think I just had another definition of native implementation of complex numbers. In python there is an actual type for them, with most arithmetic operations working without having to think about it anymore.
I am not very familiar with cpp, but...
I guess it is a bit late but I am interested if your 2nd approach worked. I tried something similar in the past where using a teensy 4.1 effectively as an ADC for my computer. I ran into the issue that the python serial connection could only...