Tonight I have been playing Guitar Hero for a little while…. I got the whole cd of Metallica - “Death Magnetics”….. and if was real fun to play….
In all honesty; I am NOT a brilliant GH player - so I even had a couple of songs which where a bit hard for me to play…..
Also a bit weird; to play something you totally didn’t hear before….
I didn’t play all the songs yet - I do like some of the music of Metallica - but a whole album…. uh… bit too much for me…. 
I was searching for some reviews on this game…. but than I read another kind of article…..;
Analysis: Metallica’s Death Magnetic Sounds Better in Guitar Hero
It seems that they used “another end mix” for the cd…… which resulted in more volume in the songs…. BUT…. in a BAD way….
On a Metallica forum have been posts about this - and according to mastering engineer Ian Sheperd this has been a result of the mixing
“the CD version on the bottom has been heavily compressed, limited and/or clipped, and sounds massively distorted as a result.”
End result; cd is 10DB louder than the GH version…. which means = the cd is TOO loud).
And people are even making a petition to make the band re-mix the album - so they could get the same quality as the GH versions….
Well; one point from me, as a gamer, why didnt Metallica also put the option to “buy” the album with the game…??
Now I am only able to listen to the songs during playing…. - but sorry…. this is not totally my music = and paying the whole amount for the album…?? NAH…..
good info here,thnks!