Transposition

Transposition refers to the process, or operation, of moving a collection of notes (pitches or pitch classes) up or down in pitch by a constant interval.

"The shifting of a melody, a harmonic progression or an entire musical piece to another key, while maintaining the same tone structure, i.e. the same succession of whole tones and semitones and remaining melodic intervals."

- Musikalisches Lexicon, 879 (1865), Heinrich
   Christoph Koch (trans. Schuijer)

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