Originally Posted by
Gerhard
My take - please correct me if I misstate anything:
- CD players generally play CDs and CDRs which contain songs stored in Wav files. Store bought CDs contain Wav files.
- mp3 and FLAC files are compressed, making them "smaller" (take up less space on a storage device, such as your hard drive) than Wav files.
- when mp3 files are created, the compression causes a loss of some of the "information" contained in the original Wav files. This loss of information results in a loss of audio quality, the degree to which depends on the extent of the compression. mp3 files encoded with a high "bit rate", such as 320 mbps, are generally considered to be very close in fidelity to full size Wav files - i.e., most people won't hear the difference, though I'm sure many can. Encoding at 128 mbps makes a smaller file, but with greater loss of audio quality than those encoded with a higher bit rate.
- mp3 files are much more practical for portable players, like iPods or iPhones, which have limited capacity, because they are significantly smaller than full size Wav files, even if encoded with a high bit rate. From looking at some of the Spock's Beard files I downloaded, the 320 mbps mp3 files are less than a quarter of the size of the WAV files, so you can fit roughly four times as much music on a device with mp3 files than if you loaded it up with Wav files.
- FLAC files, while also compressed, do not suffer from any loss of information, and therefore retain the full audio quality of Wav files. They are smaller than Wav files, but much larger than mp3 files. There are "players" (programs) that play FLAC files, but I'm not familiar with any, or don't know which ones do. If you burn FLAC files to a CD-R, I believe you essentially create a data disc, not an audio disc, as physical CD players won't play them. This is why I download FLAC files and "decode" them (convert them back to Wav files) and then burn the resulting Wav files to CDR to make an audio CD I can play in my car or home stereo CD player.
- You can also "decode" (convert) mp3 files to Wav and burn them to a CDR (most burning software probably makes this conversion automatically) but the resulting CDR will retain whatever loss of sound quality is inherent with mp3 compression. Plus, when mp3 files are created, there are often very short silent gaps at the end and/or beginning of the files, which are also retained when the files are converted back to Wav files. If you have contiguous tracks, you'll often hear these tiny silent gaps as annoying little drops in the sound, or little clicks. If you convert FLAC files to Wav, they will sound exactly like the original Wav files - no loss of audio quality and no annoying silent gaps.
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