An ‘MP3’ is a compressed audio file format. MP3’s take up far less space than higher quality audio formats, such as WAV or AIFF.

An MP3 file is a lossy format that discards some of the data from the original lossless format. A file can be converted from a lossless format to an MP3, but cannot be converted back once the data is already lost.

There are different bitrates that an MP3 can be encoded in, but the most common bitrate is 128 kb/s (kilobits per second).

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