What is "surdas"

Surdas was a late 15th-century blind saint, poet and musician, known for his devotional songs dedicated to Lord Krishna. Surdas is said to have written and composed a hundred thousand songs in his magnum opus the 'Sur Sagar' (Ocean of Melody), out of which only about 8,000 are extant. He is considered a saguna bhakti poet and so also known as Sant Surdas, a name which literally means the "servant of melody". His most famous work was ‘Charan kamal bando hari rai’ ( चरण कमल बंदौ हरी राई ) which means I pray to the lotus feet of Shree Hari