Феодор Студит
The author of the treatise wrote obviously during or after the time of Joseph and his brother Theodore the Studite, when the use the mesos forms, phthorai nenano and nana were no longer popular. The word "mousike" () referred an autochthonous theory during the 8th century used by the generation of John of Damascus and Cosmas of Maiuma at Mar Saba, because it was independent from ancient Greek music. But it seems that it was regarded as inappropriate to use these for the hymn melodies composed by Joseph and other hymns composed since the ninth century, since they must have preferred the diatonic octoechos based on the and the instead of the .