How to improve sound quality?

[AndaRebeca]

Hello!
I am having some problems with the sound quality, more precisely that it overlaps the next noteEvent.
I tried to use the adsr option to fix it. It works nice for a song having a 120 bpm.
But when I set a lower bpm, the configurations I used in adsr are creating a pause between noteEvents.
How can I fix this?
Also what are the exact ranges for adsr params?
@danigb

[VadeanAndrada]

Any updates on this?