I share this section from Polybius as often as possible, and I think you'd be interested to read it.

Since the Arcadian nation on the whole has a very high reputation for virtue among the Greeks, due not only to their humane and hospitable character and usages, but especially to their piety to the gods, 2 it is worth while to give a moment's consideration to the question of the savagery of the Cynaetheans, and ask ourselves why, though unquestionably of Arcadian stock, they so far surpassed all other Greeks at this period in cruelty and wickedness. 3 I think the reason was that they were the first and indeed only people in Arcadia to abandon an admirable institution, introduced by their forefathers with a nice regard for the natural conditions under which all the inhabitants of that country live. 4 For the practice of music, I mean real music, is beneficial to all men, but to Arcadians it is a necessity. 5 For we must not suppose, as Ephorus, in the Preface to his History, making a hasty assertion quite unworthy of him, says, that music was introduced by men for the purpose of deception and delusion; 6 we should not think that the ancient Cretans and Lacedaemonians acted at haphazard in substituting the flute and rhythmic movement for the bugle in war, or that the early Arcadians had no good reason for incorporating music in their whole public life to such an extent that not only boys, but young men up to the age of thirty were compelled to study it constantly, although in other matters their lives were most austere. 8 For it is a well-known fact, familiar to all, that it is hardly known except in Arcadia, that in the first place the boys from their earliest childhood are trained to sing in measure the hymns and paeans in which by traditional usage they celebrated the heroes and gods of each particular p351place: later they learn the measures of Philoxenus and Timotheus, and every year in the theatre they compete keenly in choral singing to the accompaniment of professional flute-players, the boys in the contest proper to them and the young men in what is called the men's contest. 10 And not only this, but through their whole life they entertain themselves at banquets not by listening to hired musicians but by their own efforts, calling for a song from each in turn. 11 Whereas they are not ashamed of denying acquaintance with other studies, in the case of singing it is neither possible for them to deny knowledge of it because they all are compelled to learn it, nor, if they confess to such knowledge can they excuse themselves, so great a disgrace is this considered in that country. 12 Besides this the young men practise military parades to the music of the flute and perfect themselves in dances and give annual performances in the theatres, all under state supervision and at the public expense.