For the 20th anniversary of “In Utero”, the album’s producer Steve Albini revisited the original multi-track analog tapes and created a new stereo mix using modern equipment and 20 years of additional experience to provide fans with a new and updated album experience.
The full 2013 Mix of “In Utero” was originally released on October 2, 2013 as a part of the album’s 20th Anniversary Re-Issue. Eventually the 2013 Mix edition received a Standalone Release on November 22, 2013.
Available as a Back To Black Friday Record Store Day exclusive on 2-LPs at 45rpm on 180-gram heavy weight vinyl and features 320kbps MP4 AAC digital download audio.
Bio Source : Nirvana Official Website