how do you mean? and why is it a problem?
but i did find
trap_S_AddLoopingSound(entityNum, lerpOrg, cSound->velocity, cSound->sfx);
check out G_Sound in g_utils... it seems to update a ents flags that include ones to play sounds?
te->s.eFlags = EF_SOUNDTRACKER;
looking around it seems that vectors/events for the sounds are read independently on the client and server from the same sv_Flags (good thing) since jk2 had so many latencey issues i wouldn't bother changing it back since it'd probably create those issues again