[rspencer]

What Leif said, except the cutoff date 2008-01-01. From the FAQ:

11. Mini-disc is accepted ONLY if it's from the original source master.
Quite simply, mini-disc uses a compression format which decreases the quality of a recording slightly from true CD quality. Since there are many excellent sounding MD sources in circulation, these are accepted provided that the original recording was made with an MD. Converting from other formats into MD and then to lossless audio is prohibited. Also, shows that have been through multiple MD generations are prohibited. Please seed your MD masters directly to lossless files, but keep the quality as good as possible by not seeding multiple gen MD stuff.

We no longer allow ATRAC MiniDisc recordings made on or after January 1, 2008 to be uploaded. This does not affect recordings made prior to January 1, 2008.