Okay I was watching one of his master class videos on youtube and I listened to his interview thing on his web site and he was talking about how a Smiling embouchure is useless and not really good to use...He also said that using a frowning embouchure and not having the corners of your mouth pointed up is better to use...I Tried practicing with a frowned embouchure but my mouth feels lose and I really don't hear a difference in my tone, unless I'm doing it wrong...Do any of you guys play with a frowned embouchure?

Kevin