DSK Brass buzzing on high notes

[arnquist]

I'm using DSK Brass in this song, what can I do to get rid of those buzzes on those long F notes? Or maybe there's some other good (and free) VSTi that I could use?

Here's my setup

and here's the song youtube.com/watch?v=eGIFMGjzTdY

[Lunahorum]

On the left instrument, make sure the sustain is lower than the decay?

I have no idea. It doesn't sound like a flanger/delay, but turn that off just to check.