I have 8 or 9 years experience on the alto, but I've only recently returned after a decade hiatus. I've never had a problem with mouth leakage, and I still don't on my Selmer C*, Vandoren Optimum AL4 or Jody Jazz HR 5. I'd like to offload some of these mouthpieces in favor of the Rascher, as I mostly play classical and it is pretty free-blowing on my 1931 Pan American.....But I leak air when I play the Rascher mouthpiece. I looked through the fixes for leaking air, and mouth position or fatigue doesn't seem to be my problem as it starts immediately and doesn't change when I take in more or less mpc.
I'm sure I'm the problem, and I'd appreciate any suggestions on what I'm doing wrong.
I'm sure I'm the problem, and I'd appreciate any suggestions on what I'm doing wrong.