how can check file quality
my tracks are all 320. i wanna check the quality. Is there any software out there that would make this quality
iTunes? Just load all your songs until iTunes and select to see the ‘kbps’ part and check them all..
But there are many other options out there also.
traktor, right click on the sort options, click bitrate
If he says they’re all 320, I think maybe he means sonic quality? And if so there’s no program I know besides the human ear and the brain.
How much to rent yours? 
I’ll rent mine for $20/hour. By that…I mean send me all of your tracks–preferably on some physical media–along with $20 per hour of play time. I’ll tell you which ones suck.
lol.
LoL
If you meant my ears, I kinda need em for work and if you meant my brain…well let’s just say you’d be better off with what you got. 
Buy your tunes. Dont use blogs as they are chronic for recoding 128’s as 320’s.
fixed
Just listen to them one after the other, particularly watch out for the “punchiness” of the low end. In isolation you might not notice the differences in quality, but next to each other it’s quite easy to distinguish 320kbps files from 192kbps for example.
You might also be interested in Platinum Notes… http://www.platinumnotes.com/