I have my music segregated by 16bit and 24bit. 24bit audio is not supported by iTunes, you need to convert to 16bit or let iTunes do it for you.
16bit: I manage this part of my catalog via iTunes. Any and all formats @ 16/44 (mp3,FLAC,AIFF, ACC, WAV..etc)
24bit: I manage this part of my catalog manually. Any and all 24bit files (predominately FLAC). I have a music sub-directory for Hi-Definition Audio. The directory structure would look something like this: Hi-Definition Audio > Artist > Album > Track (my iTunes directory structure the same).
*** I will say this again for those of you who are looking to acquire the AK120: take a look at your music catalog first! If you don't have a significant amount of 24bit music, and not looking to amass a lot soon, there are cheaper alternatives like the portable rig in my sig. If your catalog consists of 16/44 (iTunes) music, personally I think you are not getting the best bang/sound for the buck. A Wolfson iPod on ebay and a good portable amp will cost you about 1/3 the price of the AK120.
Now, if you have or are looking to amass a Hi-Resolution catalog and you have the Cans/IEMs to support them, the AK120 delivers sensational sound quality. In other words, to reap the most benefit out of the AK120, you need all the parts: 1) AK120, 2) HD Quality Tracks, 3) High(er) end Cans/IEMs . Cash is a given since it's a pre-requisite for this hobby.
Edited by MT0227 - 2/12/14 at 9:48am