Unlike standard MP3s, which discard audio data to save space, FLAC is a format. It preserves every bit of the original recording, which is essential for capturing:
FLAC files can be used to burn exact bit-perfect copies of CDs, making them ideal for long-term digital preservation of a collection. Essential Albums in a FireHouse Collection Firehouse - Collection FLAC
A complete high-resolution collection usually centers around the band's peak era with Epic Records: Unlike standard MP3s, which discard audio data to