Are you trying to in a Vocaloid program, or are you looking to manually play the audio stored inside this archive?
To look inside the archive, you will need a utility that supports 7z decompression: : Use 7-Zip (Official/Free) or WinZip . YVMPREVIEW.7z
: If you did not download a Vocaloid-related tool recently, be cautious. Malicious files sometimes use obscure names to hide. Are you trying to in a Vocaloid program,