A: Those are likely vinyl or 78 rpm shellac rips. Use audio restoration software like Adobe Audition or free tools like Audacity (click removal filter) to clean them.
While downloading Kishore Kumar's Bengali songs, you may encounter some common issues. Here are a few fixes: Kishore Kumar Bengali Songs Free Download Mp3 Zip File Fix
Some of the most popular Bengali film songs sung by Kishore Kumar include: (from Antarale ) "Ami Je Ke Tomar" (from Anurager Chowa ) "Ei To Jiban" (from Ogo Badhu Sundari ) "Asha Chhilo Bhalobasa Chhilo" (from Ananda Ashram ) "Nayan Sarasi Keno Bhoreche Jaale" 2. Rabindra Sangeet Classics A: Those are likely vinyl or 78 rpm shellac rips