![]() It is when you listen to an MP3 file with hi-fi audio gear that the loss in fidelity will become apparent. If you are listening to MP3 files on your phone, car stereo, you are not likely to notice a downgrade in audio quality. The higher the compression, however, the lower the audio quality. The compression process eliminates frequencies at the highest and lowest ends that we have a hard time hearing. Our ears are capable of hearing frequencies between 20Hz and 20kHz. So how is it decided which parts of the file will be compressed? Compression takes out parts of the audio that are considered to be inaudible to the human ear. MP3 files can be up to 10 times smaller than lossless formats. This is in contrast to lossless compressed files, such as FLAC. MP3s are known as lossy compressed files, because some of the source’s original data is lost during the compression and because the compression is irreversible. Now, there are two types of compressed files: lossy and lossless. Smaller file sizes meant you could download are share MP3s quickly, and fit a lot of them on your music player or hard drive. MP3 files had many advantages in the burgeoning age of file downloading and sharing. Apple did not invent the MP3 player (nor did they invent the MP3), but they certainly marketed it into an international phenomenal offering "1,000 songs in your pocket." All of those songs that fit onto your iPod? They were MP3 files, and because they were compressed, your iPod could hold a lot of them. If you didn’t immediately know about MP3s after they were released in 1993, you most certainly knew after the first iPod MP3 player came out in 2001. MP3, which stands for MPEG Audio Layer III, is a type of compressed audio file.
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