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), adiaulos (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. The lumens often had a tongue.