The string, being the 5th main component of the Oud, has been made from silk in the early dates whereas gut has also been used later on. In the modern era, the two lower pairs of strings are made from nylon of a 0.55-0.70 and 0.65-0.80 mm diameter. The other three pairs and the uppermost single string are made from silk covered with a very fine alloy made from copper, nickel and silver. The type of strings that the master musician Cinuçen Tanrıkorur (Turkey) uses –written in order from the lowermost pair to the higher most single string– are #0.55, #0.65, #1008, #1014, #1023, #1441. These strings are too fine for those who look for volume rather than deep vibrations in the Oud. But it should be noted that, thick strings used to obtain high volume may result in bending the neck by loading a lot of pressure on the instrument. The thickness of the strings can be measured by using a “micrometer.

The strings that the Arabs use are thicker than these which the Turkish are using. So, we need to have attention in size of strings (regardless to tuning) because we maybe destroy the oud. In the Turkish ouds the cover is more thinner than Arab oud and may break if we put Arabs strings. So, we have to pay attention that when we have a Turkish oud set up strings which are suitable for Turkish oud, and when we have Arabic oud set up strings which are suitable for Arabic tuning. For the Turkish and Arabic oud, the maker Faruk Turunz proposes the following number.

Turkish tuning
Arabian tuning
1 - RΕ : 0.60
2 - LA : 0.70
3 - MI : 1008
4 - SI : 1015
5 - FA#: 1021
6 - ΜΙ : 1036
1 - DO : 0.625
2 - SOL : 0.725
3 - RE : 1109
4 - LΑ : 1116
5 - MI : 1023
6 - RE : 1038