MSU-1 stands for Media Streaming Unit MSU-1 refers to a rom-hack/patch that replaces the audio with high definition audio and in some cases can include video cutscenes. Some of them can even be played on the original hardware. You can find custom music packages, often called MSU packs, and configure them for use with original hardware, bSNES, the SuperNT, and the snes9x emulator.
This was done on bSNES
The Legend of Zelda: A Link to the Past Statistics For Charles Cook
There are 228 views in 1 video for The Legend of Zelda: A Link to the Past. Less than an hour worth of The Legend of Zelda: A Link to the Past videos were uploaded to his channel, less than 0.94% of the total video content that Charles Cook has uploaded to YouTube.