My digital audio enhancement service corrects the flaw of music that is not in tune. Audio music from the earliest years of recording to the most recent all have one issue in common. None of them are precisely tuned. Stemming from the recording techniques used as far back as the early 1900s, to the mass production of audio music today, the purity of the live performance is diminished to some degree. The method I use to correct, or tune (enhance) the audio is to edit the file itself. Electronics and other techniques do alter the sound of the audio, but they do not alter the file directly to tune it. My enhancement process, using audio frequency filters, reconfigures the audio file in it's entirety, The result is a true 3D, HD Surround Sound Playback.