When transposing music for a trumpet in Bb, how must a teacher adjust the music?

When transposing music for a trumpet in Bb, the music must be adjusted up a major second. This is due to the nature of the instrument, which plays a whole step lower than written.

For example, if a concert pitch C is played, the trumpet will actually sound a Bb. Therefore, to achieve the correct pitch that matches the concert pitch, the written music must be transposed up a major second. This allows the trumpet player to play the correct notes that will sound in harmony with other instruments when performing together, ensuring that they are in tune with the overall ensemble.

In this context, understanding the relationship between concert pitch and Bb instruments is crucial for effective transposition and collaboration in music settings.