any music player. Also, you said that the dynamic track will sound better than the louder track. But sound better to who? Of course it will sound better to a mastering engineer BUT the average listener wont notice any unbalanced frequencies or over compression because their ears aren't trained like ours. The listeners out there are more interested in the energy of a track or the catchy melody not the dynamics therefore the louder track will be more appealing to them. I'm not necessarily saying that loudness will have impact sales. Your sales are based on your reputation as an artist, particular tracks on that album,your marketing schemes and MOST importantly, the ACTUAL music on the album. most listeners buy an album because they enjoy the artists style of music or they heard a single they like, not because of how dynamic their tracks sound or how loud they sound..so that article is pretty irrelevant. I don't think your avg listener will listen to a CD and say "wow this is really loud, im definitely going to buy this," or "Wow this is so dynamic, im going to buy it." There going to say "This melody is so catchy, ill buy it" or "These lyrics relate to my life, I'll buy it" im pretty much saying in the long run, most listener's ears are not trained like ours therefore i feel that dynamics does not play a big role to the average listener. The majority will be listening on speakers