Lochamer-Liederbuch
"Fundamentum organisandi" redirects here. For other manuscripts that contain didactic compositions under this name, see Buxheim Organ Book and Fundamentum of Hans Buchner.
The Lochamer-Liederbuch double source (also referred to by its shelf-mark, D-B Mus.ms. 40613) contains, along with several polyphonic German Lieder, a sizable collection of early keyboard repertoire dating from the 1450s. It is associated with the blind organist-composer Conrad Paumann.
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References
D-B Mus.ms. 40613 Online facsimile: digital.staatsbibliothek-berlin.de accessed 27 September 2023, mirrored IMSLP128618.
Southern, E. (1962). The Buxheim Organ Book. Brooklyn, Institute of Mediaeval Music.
Young, W. (1962). Keyboard Music to 1600 I. Musica Disciplina, vol. 16.