1) Kumar Sachin Deb, as he was known in his younger days, came to Calcutta with the reputation of a budding folk singer. Incidentally, his roots are at Royal family of Tripura.
2) His guru Krishna Chandra Dey was , a blind singer, was also the uncle of Manna Dey.
3) Dada's first attempt in films was as an actor-singer for the film Yahudi Ki Ladki where he was replaced at the last moment by another stalwart of yesteryears Pahadi Sanyal.
4) Dada came to Bombay in 1941, not as a composer but in the capacity of a playback singer. The first solo he sang was for a film Taj Mahal. The composer was Madhavlal Master.
5) Disillusioned with Bollywood, Dada once left Bombay in 1951, only to return back after some time. Manna Dey completed the score of Mashaal, which Dada had left incomplete.
6) Dada had a unique way of judging the vocal condition of singers. Very early in the morning after his morning walk he used to call them from his 'Jet Bungalow', and Listen to the singers' voice over the phone.
7) One day when Dada was in the way of routine morning walk, he saw a person was saying that "He is the father of Rahul Dev Burman by pointing him. As Dada returned home he hugged Pancham. this was the moment in his life bigger than his all successful films.
8) During recordings Dada used to control all aspects of recording, ie. Orchestral Architecture and Oral Tuning of singers. Once it happened that an extra violinist was playing in the orchestra. Dada instantly sought to know through recordist's mike that why that unwanted violinist was there. "But dada, he has already come and and we have to pay him." reply came. "Then pay him and let him go! I want one, and only one violin in this song." Dada said.
9) Jaidev Verma, Dada's assistants was a sarod player cum guitarist who achieved a generous amount of success as the composer of films like Hum Dono, Prem Parvat and Kinare Kinare.
11) C. Ramachandra on request by the studio owner, partially arranged the music for "Shikari" Dada's first film as a composer in Bombay, With a condition that his name should not appear on the record.
12) He used to go to the The Bombay Powai Lake for fishing on holidays and often used to spend the entire day fishing, often without much success.
13) There'd be good-natured bantering between them. "Baba," Pancham would pout, "you don't give me enough pocket money." And Dada would laugh back, "Oi Pancham, when are you going to contribute to the kitchen expenses?"
14) Whenever the son would try to shuffle out quietly from the music room, Dada would say, "Jao jao, I know you want to smoke a cigarette."
15) When Pancham-da and Asha-ji planned to get married, they conveyed their concerns to Dada. Sitting next to Dada, Asha-ji waiting for his words, after a long silence he told that "Pancham is our only son, a divine gift God blessed us after a lot of prayers. Now he is in your hands with a hope that both you will devote to music and give new dimensions".
16) When Dada hummed the tune for "Yeh raat yeh chandi phir kahan" (Jaal), Sahir laughed. When Dada suggested that he would use Hemant Kumar's vocals for this number, Sahir was in raptures. Dada stuck on to his choice and the song was a very big hit.
16) In "Chhod do aanchal, zamana kya kahega". Asha Bhonsle responded with "Aah", Dada of course asked her to begin the song with that "Aah" to react in a manner as if somebody was pulling her saree.
17) Lata-ji did not sing for Dada for a stretch of five years. When she did come back, it was with a vengeance and her first number with Dada was a remarkable piece in musical artistry was "Jogi jab se tu aaya mere dwaare" (Bandini).
18) For Pancham-da's composition "Chunri sambhaal gori." Dada give the final touch by simply introducing an exclamation 'Aha' between the lines of the mukhda when sung in refrain.
21) "Kaahe ko roye, Chahe jo hoye" sung by Dada (Hindi) was retained in both the Hindi and the Bangla (dubbed) version of the film "Aradhana".
22) During the one-year coma preceding his death Dada rarely reacted to any external stimuli, When Panchamda gave him the news that East Bengal had drubbed Mohan Bagan 5-0 in the IFA Shield Final. He did smile, faintly, once.
23) For his compositions he used to take inspiration from real life events and feelings. he used to roam aound on the roads. It's very rare that sat down with a harmonium to compose music. like for "Jaayen to jaayen kahan" he might have got lost, for "Ye raat ye chaandani phir kahaan" might be composed at looking through a window on a moonlit night, Looking far away at nothing in particular, as if looking for some lost treasure, he gave us the gems, "Tum na jaane kis jahan mein kho gaye".
23) He was a great innovator when it came to experimenting with instruments in a composition and well known for his last minute improvisations.
24) The trend in the industry where they believed in the principle of one playback singer for one hero in one film, for them, it was Mukesh for Raj Kapoor, Kishor Kumar for Rajesh Khanna, Mohd.Rafi for the irrepressible Shammi Kapoor and Dilip Kumar. Dada was differ from them. Repeatedly, he used more than one voice for the same artiste in the same film. Dada chose the playback singer depending on Mood and the situation where his song would be used in the film and not by which voice matched the actor's voice most. Thus, Kishore Kumar, Mohammed Rafi and Mukesh sung for Amitabh in Abhiman and no one in the audience could noticed the switch while watching the movie. Similarly Rafi, Kishore and Manna Dey offered their voices for Dev Anand in Manzil. On Raj Kapoor in the film Pyaar Dada first experiment with the voice of Kishore Kumar. In the meanwhile, he was experimenting with the voice of Mukesh on Dev Anand and Dilip Kumar. In "Sagina" Kishor Kumar's voice used for Dilip Kumar. Surprisingly he has used Manna Dey on Kishore Kumar in "Naughty Boy".