You mean *in* flac, as in the popular lossless file format? I'd suggest finding a player that works, because lossless music in general is greatly preferable to lossy formats like mp3. Almost any common player (winamp, foobar, VLC , clementine, etc.....) can play flac just fine. It's also really easy to convert it to another format using a free program like Dbpoweramp .
http://dr.loudness-war.info/ Database about the dynamic range of thousands of albums. Who's fallen casualty to and who survived the so called Loudness War? Find out for yourself. ;)
Some brilliant and essential educational stuff on that for every musiclover important topic: