0

This question already has an answer here:

Why is Trumpet mentioned as B flat pitch ? How it becomes suitable for C scale ?

marked as duplicate by Carl Witthoft, Tim, MrTheBard, guidot, Shevliaskovic May 19 '15 at 12:02

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

1

The first question already has an answer. The second is that one plays the notes in the key of D on the music, which come out sounding as if they belong to the C scale.

Not the answer you're looking for? Browse other questions tagged or ask your own question.