So here another version of my dsSynth ..
I added controls for sample position,loop size, fine tune, ...
here is the documentation .. link
I also since it seems like i haven't seen very many people release there source code for these types of the projects .. I decided to release it. It even has my grammatically incorrect notes about c and nds programming. Though this probably isn't the place to look if you are a beginner.
If you use it for anything please give me a shot out.