  Here I am proposing a discussion of some parts of the De Generatione Sonorum,
one of the short treatises written by Robert Grosseteste. The main subject of
this treatise is the phonetics. However, sound and oscillations are shortly
described. Since Grosseteste discussed a phonetics based on the analogy with
motions and their combinations, we can find in this text some hints on how a
medieval scholar approached the description of motions.
