Answer:
(Fatwa: 1268/1013=L/1430)
Your previous earning will not termed as unlawful; since a machine used for listening songs can also be used for listening lawful things as well. The education acquired through that income is also alright, likewise it is lawful to do job on the basis of the education.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
