Bad noise in NeoGeo games?

Hello there, lately i was trying the Super Sidekicks games for NeoGeo and I noticed a bad sound in the menus when moving the cursor. It doesn’t occur on the PC version of FBA. Am I the only one or has anybody experienced it too? If so, is there a way to avoid it? I’m using last version of Retroarch 1.0.0.2

I have experienced it as well, the beeps are disorted.

The “confirm” chime in Waku Waku 7 is heavily distorted as well.

Ok, I got back to NeoGeo core 1.0.0.1 and now everything sounds good again.