Cubase BUZZ..sound as it gets Louder. . .(or zizizizi)

Hi everybody.
I’m currently using Cubase artist 8, with bunch of Vsti based on orchestral.
I just finished composing orchestral music. So far so good until it reaches to where trombones/percussion comes in.
It’s a crescendo, and when it reaches to BOOM! or something like that, I keep hearing buzz noise. or perhaps zi zi zi . .
I know because it’s got louder, but does it have to do with sound card and headphones?
I;m using on board sound-card, thinking about changing it to actual soundcard, but what is the matter with zizizi sound?
Thanks :blush:


Are you using any Compressor or Limiter on your tracks or the Stereo Out?