I play just with the sfx sound, no music, no speech. The problem are two units in particular which are annoying. The first one is the commissar. Every time you click on him he makes a strange and annoying noise like dark water's breath which in addition is loudest than the other units guns.
The other unit are the noise marines. Their noise is too annoying and loud and when playing against them I just have to turn off all sounds.
So is possible to shut up these units in particular? A mod?