Shyamal Mitra began his career as a singer and music composer in the
Bengali music industry. During the 1950s and early 1960s, he composed music for successful films such as
Joy Maa Kali Boarding,
Jamalaye Jibanta Manush, and
Bhranti Bilas. During this period, he also contributed as a playback singer in numerous
Bengali films. In 1963, Mitra produced the film
Deya Neya, which marked another milestone in his career. He later produced films such as
Rajkanya,
Kheya, and
Ami Se O Sakha. He was also the producer and distributor of
Garh Nasimpur. In the early 1950s, Mitra travelled to
Mumbai with
Salil Chowdhury, where he worked in the films
Musafer,
Biraj Bou, and
Naukri. He returned to Mumbai in 1973 and collaborated with director Shakti Samanta in films such as
Amanush and
Anand Ashram. He also worked in F. C. Mehra's
Bandi and Basu Chatterjee's
Safed Jhoot and
Mamta. Subsequently, he returned to Kolkata and continued to compose and sing many popular Bengali modern and film songs. Mitra maintained a long association with
All India Radio, where he performed in various programmes, including the annual
Mahisasuramardini. In that broadcast, he sang "Subhra Sankha Robe" along with
Arati Mukhopadhyay and Ashima Mukherjee. Apart from modern
Bengali songs and film music, Mitra also contributed to other forms of Bengali music, including
Rabindrasangeet,
Nazrul Geeti, Chotoder Gaan, and
Atul Prasadi. As a composer, he also worked in the "Jatra Pala Bibi Anandomoyee". Mitra collaborated with many prominent singers, including
Hemanta Kumar Mukhopadhyay, Tarun Bandyopadhyay,
Dhananjay Bhattacharya,
Pratima Bandyopadhyay,
Sandhya Mukhopadhyay, Satinath Mukhopadhyay, Ila Basu, Supriti Ghosh, Gayatri Basu,
Utpala Sen,
Alpana Banerjee,
Manabendra Mukhopadhyay,
Talat Mahmood, and
Kishore Kumar. As an actor, he appeared in Bengali films such as
Sharey Chuattor and
Shap Mochan. ==Death and legacy==