Synth sounds really bad for me

Everytime I press a note on the on-screen piano (same with keyboard), the synth just sounds really ugly and horrible for no reason. It even does this when I change the preset or whatever. The synth just does not sound how it supposed to; and not to mention that after I press a note this sound stays for the rest of the time the app is open. Ive heard very good things about Vital, but so far I cannot make any synths because of this error.

Windows/linux/mac ? Standalone or plugin ? Have you tried changing the audio drivers from wasapi to asio to whatever is available on your BOX ?