I know i have made some very sickly sounds trying to learn a new call method out hunting, to the point of laughing at myself to be interrupted by a replying tom on its way in to me! IDK but seems out west, i can say from my experience (very limited) that getting a bird in range of hearing your call, overcoming wind ect is way more important than quality of your sounds. the trick then is getting in the bubble of his interest..