These are personal AV Famicom soundtrack rips I've done using shielded cables and approved mods like the Ace expansion audio balance restoration method, ground isolation (surgery on the motherboard), and Voultar's QSB AV Output kit. Noise cancellation was applied using a 10-second clip of the output at idle (no sound other than background hum) recorded prior to running each track. The tracks are ripped in 24-bit, 96kHz resolution and stored in FLAC mono files, complete with tags and cover art. In short, these tracks are the best you will ever hear original NES sound.