Abacus Harmonicus, or Abacum Arithmetico-Harmonicum, is a table and tabular method described in Athanasius Kircher's comprehensive 1650 work on music, the Musurgia Vniversalis.[1] The purpose is to generate counterpoint combinations. Also mentioned in early editions of the Encyclopædia Britannica, it is best described by the author's caption: "wonderful table that reveals all the secret art of counterpoint".
- ^ Kircher, Athanasius (1650). Musurgia Vniversalis (in Latin). Vol. I. p. 362.