Deutsch - Englisch
- Kadenz - cadence (Konzert: cadenza)
- kadenzieren - to cadence
- kadenzierend - cadential, cadencing
- Kammermusik - chamber music
- Kammerton - chamber pitch, concert pitch
- Kantilene - cantilena
- Kantionalsatz - cantional setting, simple four-part harmonisation
- Kirchentonart - church mode, ecclesiastical mode
- Klang - sound, sonority,ring, clang
- Klangfarbe - tone color, harmonic color, timbre, tone quality, sonority
- Klappe - key
- Klappenanordnung - key arrangement
- Klappenmechanik - key work
- Klappenpolster - key cushion, key pad
- Klavierauszug - piano score, piano arrangement, piano reduction
- kleines Interval - minor interval
- komponieren - to compose
- Komposition - composition
- Konsonanz, Ruheklang - consonance
- Kontrafaktur - contrafactum
- kontrafazieren - to adapt a secular melody for sacred use or vice versa
- Kontrapunkt - counterpoint
- kontrapunktieren - to counterpoint, to write in counterpoint
- Konzert - concert (Veranstaltung); concerto (Komposition)
- Krebs - crab, retrograde motion
- krebsgängig - retrograde, retrogressive, crabwise
- krebsgängige Umkehrung - retrograde inversion
- Kreuz - sharp (sign)
- Kreuztonart - sharp key
- Kunstlied - art song