FLAC is a ZIP file for audio—but smarter. It reduces file size (usually by 30–50%) without altering a single bit of the original CD-quality audio (16-bit/44.1kHz). When you play a FLAC file of The Ultimate Collection , you are hearing exactly what the mastering engineer heard in the studio in 2010.
If you were writing a review of this collection, the consensus among audiophiles usually centers on one key point: Barbra Streisand - The Ultimate Collection -2010- flac