Editing Clef (section)

==Further uses==
{{Main|Chiavette}}

Clef combinations played a role in the modal system toward the end of the 16th century, and it has been suggested certain clef combinations in the polyphonic music of 16th-century vocal polyphony are reserved for authentic (odd-numbered) modes, and others for plagal (even-numbered) modes,<ref>{{cite journal|last=Powers|first=Harold S.|title=Tonal Types and Modal Categories in Renaissance Polyphony|journal=[[Journal of the American Musicological Society]]|year=1981|volume=34|issue=3|pages=428–470|doi=10.1525/jams.1981.34.3.03a00030}}</ref><ref>{{cite journal|last=Kurtzman|first=J. G.|title=Tones, Modes, Clefs, and Pitch in Roman Cyclic Magnificats of the 16th Century|journal=[[Early Music (journal)|Early Music]]|year=1994|volume=22|issue=4|pages=641–664|doi=10.1093/earlyj/xxii.4.641}}</ref> but the precise implications have been the subject of much scholarly debate.<ref>{{cite journal|last=Hermelink|first=S.|title=Zur Chiavettenfrage|journal=Musikwissenschaftlicher Kongress|year=1956|pages=264–271|location=Vienna}}</ref><ref>{{cite journal|last=Smith|first=A.|title=Über modus und Transposition um 1600|journal=Basler Jahrbuch für historische Musikpraxis|year=1982|pages=9–43}}</ref><ref>{{cite journal|last=Parrott|first=Andrew|title=Transposition in Monteverdi's Vespers of 1610: an "Aberration" Defended|journal=[[Early Music (journal)|Early Music]]|year=1984|volume=7|issue=4|pages=490–516|doi=10.1093/earlyj/12.4.490}}</ref><ref>{{cite journal|last=Wiering|first=F.|title=The Waning of the Modal Ages: Polyphonic Modality in Italy, 1542–1619|journal=Ruggiero Giovannelli: Palestrina and Velletri|year=1992|pages=389–419}}</ref>

Reading music as if it were in a different clef from the one indicated can be an aid in [[Sight transposition#Clef|transposing music at sight]] since it will move the pitches roughly in parallel to the written part. Key signatures and accidentals need to be accounted for when this is done.