Altstimme

Altstimme, in German musical terminology, denotes the vocal part assigned to the middle-lower range in four-part choral writing and in operatic and song repertoire. In German scores it is listed alongside Sopranstimme (soprano), Tenorstimme (tenor), and Bassstimme (bass). The Altstimme is typically sung by a singer with an alto timbre—most often a contralto or a mezzo-soprano in modern ensembles; historically, male singers such as countertenors could sing the alto line in certain repertoires.

The typical tessitura for Altstimme is centered in the middle range, commonly around F3 to F5, though actual ranges depend on the piece, the conductor’s wishes, and the singer’s abilities. The part may carry melodic material or inner-voice lines within a four-part texture, and it frequently interacts with the Sopransstimme and Tenorstimme in shaping the overall harmony.

In performance practice and notation, Altstimme is a standard designation in choral scores and many vocal works. The assignment of the Alto part reflects both voice type and tessitura, with mezzo-sopranos and contraltos most often filling the role in modern vocal music. In historical contexts, especially Baroque and Classical repertoire, the alto line could be sung by countertenors or by female altos depending on the available singers and instrumentation.

Altstimme is thus a conventional term describing a specific vocal part—focused on range and responsibility within the ensemble—rather than a fixed gender or single repertoire.