See help /splay. I looked into this a bit, and it seems that there isn't a way to externally hook into Windows Media Player to get info about what it's doing. I could have easily put together a little DLL for this, except for that fact. I guess you'd just have to do what landonsandor said. I haven't worked with that, but it seems like mIRC has pretty good support for music files, so that should work fine.