duet
A composition for two performers, or a passage within a larger work performed by two soloists.
In Depth
A duet can be an independent work for two instruments or voices, or a section within an opera, oratorio, or song cycle where two characters sing together. The form allows for dialogue, contrast, and blending — two voices can echo each other, argue, harmonise, or gradually merge into a unified sound.
Opera duets are among the most dramatic moments in the repertoire. The love duet from Act I of La Bohème and the confrontation duet in Don Giovanni show the form's emotional range. In instrumental music, duets for two equal instruments (like Mozart's duos for violin and viola) create an intimate conversation. Piano duets (one piano, four hands) were a popular form of domestic music-making in the 19th century.
Schubert wrote many of his piano duets for himself and his friend Josef von Gahy to play at private gatherings called Schubertiades — intimate house concerts dedicated entirely to his music.