The Largest Multitrack Music Collection Ever- -... -

Imagine a painting. The stereo master is the finished canvas hanging in a museum. The multitrack master is the pile of 24 individual transparencies—each containing just the drums, just the bass, just the backing vocals, or just the cough at the end of the fourth take.

By the 1990s, ABKCO had amassed over 150,000 reels of tape. Today, that number exceeds . The Anatomy of the Archive To visualize the largest multitrack music collection ever assembled, you must imagine a fortress built for a paranoid audiophile.

Owning the physical tape does not always grant the right to release the music. Most of the collection is under "pending rights reversion." For example, ABKCO holds the physical multitracks for early Rolling Stones material, but the rights to release those recordings are negotiated separately with the artists' estates. The Largest Multitrack Music Collection Ever- -...

Under the leadership of Jody Klein (son of legendary manager Allen Klein), ABKCO has amassed a collection that rivals that of the Library of Congress. While Universal Music Group holds massive archive, the largest multitrack music collection ever assembled in one contiguous, climate-controlled space is widely believed to belong to this independent entity.

Because these tapes allow for remixing, surround sound upmixes, noise reduction, and the rescue of damaged recordings. Without the multitrack, history is locked in amber. With it, history breathes again. The Collector: The Man Behind the Tapes The architect of this monumental archive is Jody Klein (though depending on recent acquisitions, similar claims are made by the Iron Mountain Entertainment Services vault and private collector Glenn Korman —but for the purpose of this deep dive, we are focusing on the largest singular coherent collection recognized by industry archivists: the ABKCO Music & Records vault ). Imagine a painting

In the digital age, we often take for granted the ability to isolate a vocal, remove a guitar solo, or listen solely to the kick drum of a classic rock anthem. But behind every great song is a ghost in the machine: the multitrack master tape. For decades, these reels of magnetic tape—holding the individual building blocks of music history—were scattered across storage units, record label basements, and private attics. That is, until one man decided to bring them all home.

Welcome to the story of . It is a tale of obsessive preservation, legal brinkmanship, and a 10,000-square-foot warehouse where the DNA of popular music is kept on life support. What is a Multitrack Master? Before we step inside the vault, it is crucial to understand what makes these artifacts so special. Unlike a finished stereo master (the CD or streaming version you hear), a multitrack tape is the raw session . Popularized by Les Paul and brought to commercial fidelity by the Beatles at Abbey Road, multitrack recording allows engineers to record instruments on separate "tracks." By the 1990s, ABKCO had amassed over 150,000 reels of tape

This is a race against entropy. At current transfer speeds (one reel = 3 hours of real-time playback), it will take the archive to digitize everything they currently own. The Legal Minefield One might ask: If this is the largest collection, why haven't we heard all the outtakes?