MPEG Audio Layer I/II/III frame header::https://www.mpgedit.org/mpgedit/mpeg_format/MP3Format.html

An MPEG audio file is built up from smaller parts called frames. Generally, frames are independent items. Each frame has its own header and audio informations. As there is no file header, you can cut any part of MPEG file and play it correctly (this should be done on frame boundaries but most applications will handle incorrect headers). However, for Layer III, this is not 100% correct. Due to internal data organization in MPEG Layer III files, frames are often dependent of each other and they cannot be cut off just like that. An MPEG audio file is built up from smaller par