The tibia (Greek aulos - αὐλός), usually double, had two double - reed (as in a modern oboe) pipes, not joined but generally played with a mouth - band capistrum (Greek phorbeiá - φορβεία) to hold both pipes steadily between the player 's lips. Modern changes indicate that they produced a low, clarinet - like sound. There is some confusion about the exact nature of the instrument; alternate descriptions indicate each pipe having a single reed (like a modern clarinet) instead of a double reed.
what was the double-reed wind instrument that was an important part of ancient greek music
The tibia