Transposition and Transposing Instruments
What is tested
Rewrite a passage a given interval higher or lower with the correct key signature and accidentals, and work out the sounding pitch for instruments in B♭, A, F and E♭. Accidentals, not the notes themselves, are what go wrong.
Common mistakes
The key signature gets transposed and the accidentals get copied unchanged. Every accidental has to be recalculated relative to the new key signature, and this is where nearly all transposition marks are lost.
Practice with
The tool below checks your answer against the theory engine, so you get the same verdict a marker would.