Bob Childs said I had the oddest embouchure he'd ever seen, but didn't want me to change anything as it would probably be detrimental. Bizarrely the most horrific event took place in the opening statement of Calling Cornwall where the notes just fell apart. Admittedly this was two hours into a very heavy brass band rehearsal at pretty much full chat the whole time, but even so I wouldn't expect this to happen - I would expect a decline in accuracy of pitch and intonation but neither of those happened. I couldn't seem to form an embochure of any tension, but I think the aperture in my embocuhure is excessively large anyway, as I have never had much in the way of stamina. Back to the "setting up drills"! (And much more importantly, the 4AL).
1983 Boosey & Hawkes Sovereign
Denis Wick SM4 (original series)