Both are correct! Please remember your instrument is called a "Bb" clarinet. Therefore a written C sounds Bb. This also applies to the (Bb) trumpet. French horns and alto saxophones have a similar situation in that their written C sounds a note other than the piano C! Please do some research on the term "transposing instruments." I hope this will help your understanding and make sense to the situation.
Good idea with Barrel & upper joint, but messing with centre joint?. We never stop learning, but don't be precious on the job...we either HEAR it or not. Finally, we have a MUSICIAN who sounds like she can play.
I have a B♭ clarinet. I am told that, compared to the piano, it plays a whole tone higher, note for note. I presume that means a D on the clarinet is equal to a C on the piano. Surely any note has a defined frequency? If I play a note on the clarinet it resonates at a certain frequency and if I play the "same" note on the piano it apparently doesn't. One of them must be wrong. If the piano is correct, why is clarinet music incorrect? :-s If playing a certain note on clarinet, eg D, is actually producing a C, then why call it a D?
