: ACDRip , meaning the audio was ripped directly from an official Audio CD using specialized software to ensure bit-perfect accuracy.
: The .rar extension indicates the tracks are compressed into a single archive for easier sharing on platforms like Google Drive . You will need a utility like WinRAR or 7-Zip to extract them.
: FLAC (Free Lossless Audio Codec), which offers CD-quality sound without losing any data during compression.