There’s currently no way to play uncompressed audio playback in UE4 – on Windows, for example, it’s cooking to Ogg-vorbis and then playing back the compressed version (as you would hear it in the game). I’d like to allow content-browser playback/preview play the raw uncompressed audio vs the compressed version, or at least have that as an option in the editor.
We have a huge list of things we want to improve around asset management, asset workflow, asset import/export, and customization of per-platform compression.