How do I fix this exact sound problem on the NesTopia emulator?

[*Laurelindo*]

I finally found a video that beautifully demonstrates the kind of sound problem I always have while using NesTopia.

You hear how the sound is just marginally delayed throughout the whole video?
Not by a dramatical margin, but enough to be noticeable and annoying.
Well that's exactly how NesTopia always behaves for me, I have even tried this emulator on several different computers and I always get the same crap.
Actually for me it is even worse, since the sound also tries to re-sync after a few seconds, and then immediately starts de-synching again.
And this isn't even an occasional thing, it happens literally every single time I try to play a game.
The strange thing is that it is considered "one of the best emulators out there", yet I keep getting this problem myself.
What the heck is going on?
I would greatly appreciate some help here.