A B M Shahidul Islam Tutul, known as S.I. Tutul, is a Bangladeshi singer and musician who is the lead singer and lead guitarist of the Dhrubotara. He graduated from the University of Chittagong. He also works in the Bangladeshi film industry. He won Bangladesh National Film Awards for Best Music Director, Best Music Composer and Best Male Playback Singer.
From Wikipedia (https://en.wikipedia.org/wiki/S.I._Tutul) under Creative Commons Attribution CC-BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0/legalcode)