Re: flute embouchure
Disclaimer; I am not a fluter, but I play quite often with a very good one. There is another fluter who comes to our sesiun quite often, who is more of a student player, and sometimes gets advise from our regular guy.
One evening he was asking about embrochoure and was shown a little exercise; Hold the flute as you usually do and play a long note. As you play, rotate both your arms right and left, so that the flute pivots across your lips (you hold your head motionless while doing this). You will be suprised by how much your tone and volume will vary as you do this. Try to find the "sweet spot".
Then experiment with "rolling" the flute towards and away from your lips and notice how it affects he sound as well as the amount of effort needed to produce it.