I experience grave sound problems in that game, that I didn`t have in EOB 1 + 2.
The Intro is just fine. But the rest of the game gives me weird sound effects, that don`t even fit to the situations.

Living creatures make a lot of loud noise, on forest areas you will also hear bird chirp sounds. If you kill ALL the creatures in area you will not hear them any longer (it's possible). The sounds in EoB3 are indeed very loud and bit too much.

In case you hear a dozen of crackling sounds when you swing your weapon here is a fix for you:
https://www.gog.com/forum/forgotten_realms_collection/eob_3_sound_issue_crackling/post5

This particular *crackling* bug was introducted with the updated DOSBox version, it could be cured either by downgrading the DOSBox or with a workaround with renaming file DOS32A.exe to DOS4GW.exe (the link above will cover just that).