Sfz file import is one of the features that i like the most in Serum 2. It's like having an omnisphere where you can import your own sounds. Unfortunately, current Serum2 doest no import loop points that are embedded in wav files. which makes that most of my sfz files don't load correctly.
It would also be nice to change the start point of samples in the multisample engine, like you can do on the sample engine.
best regards
