Lossless audio encoding like FLAC and Apple Lossless have existed for a long time.
What changed? Why did people suddenly start craving mobile high-definition music? Apple’s iTunes has sold (and now streamed via Apple Music) 256 kbps AAC files since 2011, and Spotify has offered 320 kbps mobile streaming since 2012. This opens a world of possibilities for on-demand music services to deliver “near-CD” quality at tremendously faster speeds. CD-Quality FLAC file (compressed): 15.85 MBĮven the highest bit rate (320 kbps) lossy compression reduces a song to 1/4 of its original size.CD-Quality WAV file (uncompressed): 31.7 MB.These bit rates determine how much audio data is removed, and the size of the file itself following compression. This type of compression is referred to as “lossy,” and comes in a variety of bit rates. Both formats take audio data and compress it by removing parts of the information deemed irrelevant to the listening experience. Historically, the most successful music streaming services have operated using two key formats: MP3 and AAC.
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