 The previews of the film were held at various places , where it was well received by critics and audiences . Noted writer M. Govindan wrote a cover story in his magazine <unk> , and organised a seminar on the film in Chennai , then known as Madras . Various intellectuals and writers took part in it , including noted film experts like P. Bhaskaran and director Balu Mahendra . Noted critic and film director <unk> mentioned that Devadas 's sound mixing work was one of the major attractions of the film . Considerable use of natural sound , apart from background music , was new for Malayalam cinema . Cast performances were also praised by critics . Bharath Gopi received considerable attention even for his minimal screen appearance . Though Madhu had acted previously in several films , including Ramu Kariat 's National Award @-@ winning film , <unk> ( 1965 ) , Swayamvaram marked a turning point in his career . 
