What is "nashenas"

Nashenas ( Pashto/ Dari: ناشناس), born as Sadiq Fitrat Habibi, (Pashto/Persian: صادق فطرت) is one of the oldest surviving musicians from Afghanistan. His fame began in the late 1950s, and since then he has produced many albums consisting of Dari, Pashto and some Urdu songs. He is sometimes called "the Afghan Saigal".