Hang Massive - Once Again" - Guda Drum Cover Version (Anatoliy Gernadenko plays) Guda Ortus Brass. Kurd scale. Performed by Anatoliy Gernadenko (https://www.youtube.com/user/SnowHang) Ortus kind drums have an unusual cup shape, that is not typical for steel tongue drums class. This instrument is made of two different metal alloys, that have great sound characteristics. The bottom is made of aluminum, the upper hemisphere is made of brass. Its diameter is 14 inches, weight is about 2 kg. It may comprise 8-10 “tongues”, contain two notes on each one: the main tone and higher tone - overtone.