দূ:খিত আমি গানের লিংক টা দিটে পারছিনা।
তবে গানটা হচ্ছে লালনের "আমি কোথায় পাবো তারে, আমার মনের মানুষ যেরে"

"Amar Shonar Bangla had quintessentially ‘Bengali’ origins. The story goes that the original score was written by Gagan Horkora, a disciple of Lalon Shah who worked as town crier in Shilaidah, Kushtia (now in Bangladesh). Tagore, while he was based in Shilaidah supervising his family’s zamindari estates, apparently took a liking to Horkora’s composition and set it to music with his own lyrics in 1906."

লিংক - http://www.bangladeshlive.net/971053.html

(বি:দ্র: - একজনের কমেন্টের জবাবে এই পোষ্ট।)