Well, I don't want to divert from the original topic but since you raised this point, let me shed some light on this. AAC works based on the way humans perceive sound. Our ears are more sensitive to certain sounds and less sensitive to certain sounds. That's the exact principle AAC relies on to remove information to reduce the file size. A good AAC at a constant bitrate of 320 kbps can consume up to 70/80% of the original WAV file size. It was tested over thousands of users to perfect this protocol over a span of a decade. That said, the amount of
humanly perceivable information it removes, it's negligible. It almost sounds like 90% of the original WAV file. It sounds dull because of the way most of the streaming providers use AAC to encode (256 kbps/Variable bit rate), not because the AAC is a bad encoding protocol.
Now, the rest 10% comes under the Law of the Diminishing Return. You are free to shell out as much as you want in your quest for the rest of 10% i.e the '
Perfect Sound'. Happy Listening.