1523: Pietro Aron, Toscanello in musica, Venice; tr. Peter Bergquist, Colorado Springs, 1970.

1558: Gioseffo Zarlino, Le istitvtioni harmoniche, Venice; R/1965 New York

1565: Thomas de Sancta Maria, Arte de tañer Fantasia, Valladolid; R/n.d. Madrid (2pp.)

1611: Adriano Banchieri, L'organo svonarino, Venice;R/1969, Amsterdam (1p.)

1612: Johannes Lippius, Synopsis musicæ novæ, Strasburg; microfiche, IDC; tr. Benito Rivero, Colorado 1977

1615: Salomon de Caus, Institvtion harmoniqve, Francfort; R/1980 Geneva

1636: Marin Mersenne, Harmonie Universelle, Paris; R/1975 Paris

c.1700: Roger North, 'The tuning of clavicall instruments', in ed. John Wilson, Roger North on Music, London 1959

1731: Peter Prelleur, 'The Harpsichord', in The Modern Musick Master, London; R/1965 Kassel (1p.)

1740: James Grassineau, A Musical Dictionary, London; R/1966, New York

1752: Johann Joachim Quantz, Versuch..., Berlin; R/1968 Kassell; tr. Edward Reilly, London 1966

Modern authors:

Otto Kinkeldy, Orgel und Klavier, Leipzig 1910, R/1968 Hildesheim

David J. Way, The Flemish Harpsichord construction & maintenance manual, Zuckerman, Stonington, Connecticut, 1974 etc. (4pp.)

Sven Berger, Om Medeltonsstämning och Intonationspraxis, Gothenburg, Sweden, 1984 (6pp.)

David Kettlewell, Det Finns ingen Gammal Musik, Sweden, 1986