 The former was an unabashed sophist, while the latter is said (in Plato's "Protagoras") to have used musical expertise as a front for being a sophist.Some of Damon's research certainly concerned the features of ancient rhythms, their metrical counterparts and their ethical character; he also worked on specific modes ("harmoniai"), classifying and describing especially the so-called 'loose Lydian' mode (cf.Ps.Plut.