Original sentence: To support the overwhelming emotional content of the opera, Strauss uses a very large and in some ways unusual orchestra, with the following instrumentation: woodwind: piccolo, 3 flutes (flute 3 doubling piccolo 2), 3 oboes (oboe 3 doubling English horn), heckelphone, clarinet in E-flat, 4 clarinets in B-flat and A, 2 basset horns, bass clarinet, 3 bassoons, contrabassoon; brass: 8 horns (horns 5-8 doubling 2 B-flat tenor and 2 F bass Wagner tubas), 6 trumpets, bass trumpet, 2 tenor trombones, bass trombone, contrabass trombone, Tuba;.percussion: 6-8 timpani (2 players), snare drum, bass drum (with switch), cymbals, tam-tam, triangle, tambourine, castanets, glockenspiel; keyboards: celesta (ad libitum); strings: 2 harps, Violins 1, 2, 3, and 4 (Violin 4 doubles Viola 1), Violas 2 and 3, Violoncellos 1 and 2, Double bass
Edited sentence: To support the overwhelming emotional content of the opera, Strauss uses a very large and in some ways unusual orchestra, with the following instrumentation: woodwind: piccolo (douling fourth flute, although this is omitted from the instrumentation list at the beginning of the score), 3 flutes (flute 3 doubling piccolo 2), 3 oboes (oboe 3 doubling English horn), heckelphone, clarinet in E-flat, 4 clarinets in B-flat and A, 2 basset horns, bass clarinet, 3 bassoons, contrabassoon; brass: 8 horns (horns 5-8 doubling 2 B-flat tenor and 2 F bass Wagner tubas), 6 trumpets, bass trumpet, 2 tenor trombones, bass trombone, contrabass trombone, Tuba;.percussion: 6-8 timpani (2 players), snare drum, bass drum (with switch), cymbals, tam-tam, triangle, tambourine, castanets, glockenspiel; keyboards: celesta (ad libitum); strings: 2 harps (doubled if possible at the end), 24 Violins divided into three groups, 18 Viola divided into three groups (the first of which, unusually, doubles as the fourth violin section, 12 Violoncellos divided into two groups, 8 Double bass