I play electric bass in a classical guitar ensemble. Last night at our concert we played a beautiful arrangement of Grand Solo by Fernando Sor, and the bass part was in drop d. Eleven minutes of pure joy, the song was great. So then we leave the stage and various small combos and soloists begin to perform. Now it's my quintets turn. We're doing an arrangement of the theme song from the movie Rudy, which is NOT in drop d. Do I re-tune my bass, nope. To make matters worse, that string doesn't even come into play until about 30 seconds into the song. Arrrrggggg! Improvisation takes over and in the end it doesn't turn out too bad. Needless to say I was freakin' out the whole time. Lesson learned, always check your tuning!