An instrument change from one transposition (Clarinet in Eb) to another transposing instrument (Clarinet in Bb). The displayed instrument name should also be updated. The whole piece is in Bb major (sounding), so first the key signature should be one sharp, after the change it should have no accidentals. Clarinet in Eb Eb Cl. 1 1 major 4 4 G 2 2 3 C 4 4 1 whole 0 major -1 -2 Clarinet in Bb Bb Cl. C 4 4 1 whole C 4 4 1 whole light-heavy