there are some inconsistencies, like with my other much less in price sony nw-a55, in my listening experience with the sony nw-zx507. the problem is still the custom setup with flac and also how my ears get adjusted. in my personal endeaver to make out a very good custom setup and then listening i try to consider my mental play on what scientifically, the moronistic suggestion goes in rule of what contains most of what the point in maintaining the scientific consideration. but as much i have the ability to keep up to some amount consideration in science my ears tend to loose focus on my foremost in the listening experience of the rock albums. i have some problems with somthing unexplainably happening when i listen over some time but my ability to reason in some amount of energy seems to be translucent in some way i seem to loose focus in some amount of self natural measuring but the play of my mind seems to not be able to catch the problem of the slipping effect. sometimes i get back inside the stay of all main focus but in ways its measureable with myself where i think the slipping is coming from something or someone thats not me and theres no way ill ever know.....