tennhunter........i for one cannot call with just my mouth (no call in mouth)...however, my brother is VERY, VERY good at it...in fact he sounds much more natural then i can with a mouth call.

i think it has a lot to do with vocal cords and each persons voice. i have a deep voice and cannot get the call to work well out of my mouth...but to each their own. (still talking about calling without a diaphram)