It's been years since I dealt with transferring minidiscs. Attached is the SONY Sonic Stage installer. It's what I used all the time but that was on windows XP and 7. I also still have the SONY WAV converter but don't recall if you needed it in conjunction with Sonic Stage
Only works if you have the NetMD. Realistically, it was the final minidisc model RH1 that finally threw away all the extra copy protection BS, and let you do a straight digital transfer from any minidisc type (SP, LP2, LP4, HI-MD, etc.). Then does the ATRAC decompression on the computer. Big reason I kept mine.
OP looks to have a MD deck with a spdif output. MD only records at 44.1khz, so I echo the rest of the folks comments here about a sample rate mismatch.