The LAME header is an extension of the Xing header and is found in variable bit rate encoded .mp3 files.
Xing
variable bit rate
The MPEG audio samples follows the MPEG side information in an MPEG audio frame.
The actual audio data for an .mp3 file is stored in MPEG audio frames.
The audio portion of an .mp3 file is stored in MPEG audio frames as shown below.
The MPEG side information follows the MPEG audio frame header in an MPEG audio frame.
A VBRI header is found in variable bit rate encoded .mp3 files that were encoded using the Fraunhofer encoder.
The Xing header is found in variable bit rate encoded .mp3 files and is identified with an id of "Xing".