Physical Heavensward OST instead of itunes?

[LunaHoshino]

iTunes doesn't use a proprietary system. All files are encoded in AAC and can easily be re-encoded to whatever format you wish (MP3, WMA, OGG, etc).

It's proprietary in the sense that A) you can't even purchase music without first downloading iTunes, and B) you have to re-encode it to put it onto a non-Apple MP3 player, neither of which are things I wish to do. With Amazon and Google, you click a button, and boom, you've got an MP3. No program download or re-encoding needed.