Double Bass Capuzzi?

[pwrmax]

My school has a concerto competition every year for a few students to play a solo with the orchestra. I'm gonna give the Capuzzi concerto a try but while ordering the music I have the option for both in the key of D and F. The orchestra is in charge of finding their own music, so which key is the default one?

 

[Pat Harris]

F is the key it's typically performed in.