24 inventions for organ, op. 50, nos. 1-12 1 no. 1 in c major: poco animato 2 no. 2 in a minor: calme 3 no. 3 in g major: allegretto 4 no. 4 in e minor: andante serioso 5 no. 5 in f major: andantino 6 no. 6 in d minor: allegro con moto 7 no. 7 in d major: quasi adagio 8 no. 8 in b minor: poco allegro 9 no. 9 in b flat major: andante gracioso 10 no. 10 in g minor: quasi scherzando 11 no. 11 in a major: lento 12 no. 12 in f sharp minor: vivace 6 chorales, op. 28 13 no. 30 christ my lord , god's only-forgotten son 14 no. 31 lord god , now open wide thy heaven 15 no. 32 lord jesus christ , turn unto us 16 no. 33 my soul longeth to depart in peace 17 no. 34 on this day the son of god triumpheth 18 no. 35 help me o god , that i may overcome 4 modal fugues, op. 63 19 no. 1 mode dorien 20 no. 2 mode phrygien 21 no. 3 mode locrien 22 no. 4 mode ionien 2 chorales, op. 59 23 no. 1 rejoice greatly, o my soul 24 no. 2 dearest immanuel, lord of the faithful 24 inventions for organ, op. 50, nos. 13-24 25 no. 13 in flat major: allegro giocoso 26 no. 14 in c minor: allegro moderato 7 no. 15 e major: cantabile 28 no. 16 in c sharp minor: andante con moto 29 no. 17 in a flat major: andante sostenuto 30 no. 18 in f minor: marcato 31 no. 19 in b major: larghetto 32 no. 20 in g sharp minor: poco vivace 33 no. 21 in d flat major: tranquillo 34 no. 22 in b flat minor: adagio 35 no. 23 in g flat major: non troppo vivo 36 no. 24 in e flat minor: moderato assai