Cantores Euphorionis again

Why cantoribus? The reference of the phrase cantores Euphorionis has been much discussed, by the author of this note among others. But what is the sense of cantores? The Thesaurus Linguae Latinae, Lewis and Short, and the Oxford Latin Dictionary variously classify Tusc. 3.45 as an instance of cantor in the special sense of ‘supporter’, ‘imitator’, or ‘eulogist’. Recently, however, W. Allen suggested that this may be to read too much into the word: ‘… cantor could well have the standard meaning of personal and private recitation of poetry. Since sometime cantare and legere have a semantic identity, however, it may be possible that the word cantores in hi cantores Euphorionis has a meaning no more momentous than that of lector. ’