Reduction (music)

(a) first four measures of Bach's Preludium in C major (BWV 846a). (b) and (c) block chord reduction and voice leading reduction ease analysis and practice
Full score of the "Lacrimosa" from Mozart's Requiem. playⓘ
Two-hand piano reduction of the "Lacrimosa" from Mozart's Requiem, arranged by Franz Liszt. playⓘ
Two-hand piano reduction of the "Lacrimosa" from Mozart's Requiem, arranged by Carl Czerny. playⓘ
Four-hand piano reduction of the "Lacrimosa" from Mozart's Requiem, arranged by Czerny. playⓘ
The Queen's Dolour (A Farewell) by Henry Purcell / Realised by Ronald Stevenson (1958)
Performed live by Mark Gasser
Awake, the Voice Commands
Transcribed for piano by Ferruccio Busoni from the Schübler Chorales by Johann Sebastian Bach, performed by Martha Goldstein
Prelude and Fugue in A minor, BWV 543
Franz Liszt's transcription of Prelude and Fugue in A minor, BWV 543 composed by Johann Sebastian Bach, performed by Raymond Smullyan
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In music, a reduction is an arrangement or transcription of an existing score or composition in which complexity is lessened to make analysis, performance, or practice easier or clearer; the number of parts may be reduced or rhythm may be simplified, such as through the use of block chords.