is it possible that you load a sample in and if you push a higher or lower note normally the sample is played faster/slower, is it possible with resynthesis that the sample is played at the same speed?
and if i have 2 samples that i can play the same note of both and they sound fitting together?

i enabled resynthesis but it didnt work so far

Set a source to Granular (not Sampler) to avoid the chipmunk effect and enable timestretching, the more you transpose the more artifacts you will hear though. Or import single wavs using additive or spectral resynthesis. Maybe reading the manual for a minute or so will get you a bit further. These are the very basics...