The most famous of the wind instruments in ancient Hellas was the flute(Aulos). Depending on its construction, it was called a mono (single lumen), a sidewalk (a flute played sideways like the modern flute), a diaulos (double lumen). The lumen was constructed in various sizes, corresponding to the current soprano, alto, tenore, basso voices, and was commonly used as a double lumen pair. The two ducts of the couple may have the same or different tube length. The flute was a basic instrument in all celebrations in Ancient Greece, especially at ceremonies in honor of Dionysus. In vase representations it is often seen that the lumen was fastened with a leather band that passed around the head and had an opening in the lip region.