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 flat, after the change it should have no accidentals. Both the instrument name and instrument name abbreviation use the <accidental-text> element to display a proper ‘flat’ glyph. Clarinet in E flat Cl. (E flat ) 1 1 major 4 4 G 2 2 3 C 4 4 1 whole 0 major -1 -2 Clarinet in B flat Cl. (B flat ) C 4 4 1 whole C 4 4 1 whole light-heavy