What is mp3?
Audio Layer 3 another term from MP3, it is a digital audio encoding format using a form of lossy data compression. The MP3 files begun to fully recognize to the internet, it has the ability to encode audio, during encoding, there are 576 times domain samples taken and are transformed to 576 frequencies domain samples.
And sometimes if there is a transient, 192 samples are taken instead of 576. This is done to make limit the temporal spread of quantization noise accompanying the transient. It has also the ability to decode audio and it carefully defined in the standard. In fact it has also its own audio quality. The lower the bit rate used, the lower the audio quality will be, but the smaller the file size it has.
Bit rates, file structure, design limitations, ID3 and other tags, volume normalization, are also some of the composition of MP3.