Psychoacoustical Codecs Using SBR
SBR has been combined with AAC LC to create MPEG-4 High Efficiency AAC (HE-AAC), with WMA 10 Professional to create WMA 10 Pro LBR, with MP3 to create mp3PRO, and with MPEG-1 Layer II (MP2). It was published for MPEG-4 Audio (MPEG-4 Part 3) in ISO/IEC 14496-3:2001/Amd 1:2003 and defined as one of the MPEG-4 Audio Object Types.
It is used in broadcast systems like DAB+, Digital Radio Mondiale (DRM+, not DRM), HD Radio, and XM Satellite Radio.
If the player is not capable of using the side information that has been transmitted alongside the "normal" compressed audio data, it may still be able to play the "baseband" data as usual, resulting in a dull (since the high frequencies are missing), but otherwise mostly acceptable sound. This is for example the case if an mp3PRO file is played back with mp3 software incapable of utilizing the side information.
Read more about this topic: Spectral Band Replication