Having a FLAC file means nothing if you listen through $10 earbuds.
Unlike MP3s, which discard audio data to save space, FLAC is a "lossless" format. It compresses the file size without losing a single bit of audio information. For a band as sonically experimental as The Beatles—from the lush orchestral arrangements of Eleanor Rigby to the heavy distortion of Helter Skelter—FLAC provides: The Beatles - Discography -FLAC-
Years ago, Apple released a limited edition “Beatles in Mono” USB stick containing 24-bit FLACs of all mono albums. This is the holy grail. While out of print, finding a verified rip of this from a friend is the only way to get official, high-quality mono FLACs digitally without buying a $400 collector’s item. Quick review — "The Beatles - Discography -FLAC-"