Back in old times, music comes in forms of Vinyl LPs, tapes, CDs, SACDs or DVD-As. Nowadays, almost everyone owns a smart phone or tablet computer. Therefore, everything is going digital. Most of us are now getting used to Apple Music, Amazon Music, Spotify, Rdio, and the like.However, among us, there are still quite many audiophiles who are not satisfied with the music quality offered by the above-mentioned services.