Arnob is a member of the band Bangla. In addition, he has released four solo albums and also worked with Prayer Hall. The debut album as a solo artist was Chaina Bhabish which included the acoustic version of the famous song Shey Je Boshe Achhe, followed by Hok Kolorob. This album was a compilation of songs Arnob had written during his years at Shantiniketan. This album also contains lyrics of Sahana Bajpaie and Taufiq Riaz.
Arnob released his third album Doob in April 2008. He worked with Sahana Bajpaie, Srabonti Narmeen Ali, Saad, the MAK, Zohad, Andrew, Idris Rahman, Fariha Kamal, Rajib Ashraf and others.
Arnob released his fourth album "Rod Boleche Hobe" in October 2010. It is his 4th studio album and was released from his own music company "Adhkhana Music".
He has also arranged the music for Sahana Bajpaie's Rabindra Sangeet album Notun Kore Pabo Bolay and for Krishnonoli's album of original songs titled Surje Badhi Basha. He contributed to the theme songs - Bandhan, Flat no 40, Sporshe'r Baire - and TV advertisements . On August 11, 2009 his concert album was released named Arnob and friends live. In 2012 he released his 5th solo album a Rabindra Sangeet album named Adheko Ghume.
He was the music director of the Bengali film Monpura, Aha!, Jaago and Dip Nevar Age.