I have recently been playing the cornet a lot more due to a brass band contest and also have been having a go at the french horn. About three weeks ago I noticed that my lips didn't feel right when playing anymore and also found that I was moving the mouthpiece around on my lips while playing.
I used to have a good embouchure. I usually play slightly off centre and the mouthpiece sits more on my bottom lip than top. I have great stamina and endurance. After having a lesson with my teacher last week he noticed that I didn't quite sound like 'me' anymore. I have lost my big sound and my notes tend to 'wobble', not by pitch though.
He has told me to work on my lip buzzing, which is something I have never been able to do before but have noticed an improvement over the last few days. Long tones is also something I have been working on.
Now that the band contest is over, I will be moving back to playing trumpet more and leaving the horn for now. I would just like some advice on any other ways to improve my embouchure as quickly as possible. I play for around 2 hours each day and plan to put in a lot more work over the next couple of weeks to improve as much a possible.