I have been playing/teaching trumpet for 25 years. Recently, however, I have been invited to enter the ballet orchestra scene. This music is often written for Cornet in A. If I found an actually "A" trumpet or cornet, would I have to transpose my thinking from the usual Bb tuning? Or, would a 3rd space C still be played open as in Bb land?
The other option, I suppose, would be to try to transpose the "A" music on my Bb horn. Might be a nightmare!
Thanks for any help you can provide.