I am glad to introduce you my musical instrument GUDA.
The instrument consists from two hemispheres made from 1,2 mm steel. The sound hole is located in the center of the upper hemisphere for more bright and loud sound.
The lower hemisphere has no hole and serves as the amplifier of the resonance. The oval-shaped tongues are located at the upper hemisphere.
Our innovation consists in the method of tuning. Manipulation and forging of the tongue causes very intresting effect – one tongue produces 2 notes instead of one: main tone+overtone, which is commonly tuned +1 octave.The main note is sounded along the length of the tongue, and the note +one octave higher sounds across its width. It is hard to understand, but very simple to hear So when you play the Guda you can hear the main tone plus additional “steelpan-like” overtone which is tuned +1 octave higher (also it can be tuned in another interval, but +1 octave is the most universal tuning)
Also, you can play these overtones separately – you need to hit underneath the tongue. You can hear the high note which we call “flageolet”. It is similar to playing flageolets on guitar or other string instruments.