Khanjan Nayan is a beautiful biography of Surdas by Amrit Lal Nagar, a famous writer from Chowk in Lucknow.

Sri Mahaprabhu Vallabhacharya ji encouraged Raga seva as a means of devotion to Krishna. He appointed eight accomplished devotee-singers for Sri Govardhan Nath ji’s Raga seva:

सबसे ऊंची प्रेम सगाई १. दुर्योधन के मेवा त्याग्यो, साग विदुर घर खाई २. प्रेम के बस नृप सेवा कीन्हीं, आप बने हरि नाई. Surdas was one of the Ashtsakha (8 friends of Krishna), appointed by Mahaprabhu Vallabhacharya ji to perform Raga seva to Sri

This bhajan by Surdas ji, is sung by Anisha Sharma in celebration of Braj culture, where Raag seva was a predominant sadhna, as per Swami Haridas, Hit-Harivansh, Meera Bai, Raskhan, Asht-chhap sakhas Surdas, Kumbhan Das, Parmanand Das, and others...