This is my first post on this forum. I have been playing oboe for around 18 months. I try to practice daily but I am an adult learner with a full time career (not in music) so it doesn't always happen. How long will it take before my embrochure is developed enough to play for longer than 30 minutes? Occasionally I can stretch out to 45min, but by then I am overblowing the high notes and all of my notes are shaky, horrible and really sharp, even if I started off at the correct pitch! The worse thing is, unless I have my virtual piano open on the computer, I don't even realise I'm getting sharp, until I check the note I finish on with the piano. It's terrible! Even after 25 years of violin playing, I can't hear that I'm getting sharp when I play by myself.
Any endurance tips or reassurance, or am I doing it wrong?!