 Likewise, Strabo's "Geographica" reports that the Parthian youth were taught songs about "the deeds both of the gods and of the noblest men".The modal concepts in Iranian folk music are linked to those of the country's classical music.Many of Iran's folk songs have the potential of being adapted into major or minor tonalities, and Iranian singers of both classical and folk music may improvise the lyric and the melody within the appropriate musical mode.