What’s the Difference Between All These Audio Formats, and Which One Should I Use?

While most casual listeners can't tell the difference between formats, choosing the right file type has practical consequences for file size, quality, and compatibility.

However, don’t expect there to be much of a difference. Apple says “the difference between AAC and lossless audio is virtually indistinguishable.” ...

According to Tidal the two formats used are compressed tracks play in AAC 320 kbps and Tidal's HiFi-quality setting, which has CD quality and is played in FLAC format.