Yesaya Wilander Soemantri is called Echa Soemantri; an Indonesian young drummer is well known among musicians as a freelance drummer who plays a wide variety of genres. Among drummers, he is famous in his energetic and "cool" style. Echa was born on July 7, 1989 in Jakarta and has engaged in several major events such as the Jakarta International Java Jazz Festival and other International Jazz Festivals. Without mentioning all musicians who put his name on the list of players in the band's entourage, Echa Soemantri was the first drummer of Indro Hardjodikoro - The Fingers, Erwin Gutawa, Tompi, Abdul as a few to name. Not ONLY playing on stages around the country.