The oud is a fretless, 11 string Middle Eastern instrument. It is a “double-course” instrument, meaning the strings are positioned in pairs and tuned in unisons, except for the treble-most string, which is single. The scale length is about 620 mm. Modern oud strings are made of nylon.
The body of this instrument is made of mahogany, approximately 1 ¼” thick, which was hollowed out to reduce weight and add resonance. Hollowing the body created a surprisingly strong acoustic tone, which would not have been possible in a solid-body instrument. The soundboard is Sitka spruce. The necks were made of mahogany. The oud peghead is at a 55 degree angle to the neck (a standard guitar peghead would have a 10-12 degree angle). The oud neck is 36 mm wide at the nut; the classical neck is 52 mm wide. There are Fishman pickups installed in each bridge. The body shape was taken from an oud and widened a little to accommodate the second neck.
Materials: Mahogany, Sitka Spruce