I have been searching for a VOCAL filter for those hard to record grainy voices. Some would call flat - monotone types. I recommend JS OZZIFIER. I am not exactly sure how it works. But it seems to put a harmonic overtone that smooths out hard to mix voice types. Maybe a slight delay type double tracking and/or chorus. (If the voice gets too 'wet' or overdone - just back off the wet or I like to double track the voice and use OZZIFIER on one of the tracks then render to one track after I am done. Well done JS plugins.