I have to say that I don't fully understand how that could be since typical male voices will be above 80Hz
I think you have fingered the issue right on. If a male voice is above 80Hz and the VP180 is set to a threshold of 40Hz, then our experience was that the non-voice sounds between 40-80Hz were reducing the clarity and intelligibility of the dialogue. As I moved the threshold up from 40 to 60 and then from 60 to 80, the dialogue became increasingly clear and focused.
I am going to continue to experiment with the threshold setting to see if this is simply a matter of me adjusting to the system.
