The highlight of the Cumbus is the alum bowl that resonates the sound. The membrane in the cumbus is usually plastic and sometimes real natural skin. The cumbus is tuned in variety of options, from normal Oud: C F A D G C (low to high), Though high tunings sound better for us. Another favorable tuning is F A D G C F (low to high). We also suggest you to play with the screw that connects the bowl and the neck, in order to change the string action and sound color.
Read more about the Cumbus family