The race to save music: Rescuing a 3M 32-track reel from the king of rockabilly

When a fragile 1-inch audio reel arrived in Hollywood from Finland, it wasn’t just another transfer job. It was a race against time and technological extinction.

The reel was recorded on Scotch 275 tape, a formulation designed specifically for the 3M Digital 32-Track machine.  At present, Iron Mountain Media and Archival Services operates the only working 3M Digital 32-Track machine in the United States. There is only one other known operational machine in Germany so this transfer is not only highly specialized, but it is also increasingly urgent due to the age and rarity of the machines available.

In its time, the 3M Digital 32-Track system was revolutionary -  it was the leading digital multitrack recording platform before being surpassed later by Sony systems. Major artists and studios relied on it during a pivotal era of music production.

Today, however, the format is critically endangered.

Industry discussions and archivists estimate that perhaps 1,000–2,000 of these digital reels may still exist worldwide needing transferred - sitting in storage rooms, vaults and private collections. Without access to a functioning machine, the data on those reels is effectively inaccessible.

And unlike analog tape, early digital formats present a unique paradox: many people assume digital recordings are permanent…and they are not.

The challenge: Digitizing an aging and rare digital tape

When this particular reel arrived, it was not labeled and contained no metadata. Our customer also did not have any prior knowledge of what was recorded on it so the transfer began blind. 

The process began with tape baking, which is a controlled dehydration technique used to stabilize aging magnetic media. Baking reduces playback errors by temporarily restoring the physical integrity of the tape binder.  This reel actually required three separate baking cycles before the tape stabilized sufficiently for reliable playback.

Transferring on the 3M machine demands constant vigilance.  We must monitor the audio capture software while also watching the machine’s LED error indicators. Not all errors are audible; some only appear as flashes on the panel.

Because of media degradation and the machine’s sensitive nature, multiple transfer passes were necessary. Each pass recovered different clean sections of audio. Those sections were then carefully edited together to create complete, error-free files.

Content discovery and a surprise voice

With no labeling to guide us, the contents of the reel were initially unknown. During transfer, vocals on one of the songs provided a lyrical clue and through a Google search, we ended up hearing the King of Rockabilly himself, Carl Perkins!  Carl Lee Perkins (1932-1998) was one of the founders of Rock and Roll and perhaps best known as the writer and original singer of the rockabilly classic “Blue Suede Shoes.”  As a fellow guitarist, I was delighted to figure out the mystery of the asset and help give new life to an icon’s recording on behalf of our client. 

Why digital preservation cannot wait

One of the biggest misconceptions in media preservation is that digital formats are permanent.They are not. Early digital tapes, hard drives, optical discs — all are vulnerable:

• Magnetic binder breakdown
• Signal loss
• Hardware obsolescence
• Component failure
• Disc rot and data corruption

Unlike analog recordings, which often degrade gradually, digital recordings can fail catastrophically. When digital data is lost, it cannot be reconstructed.  Just as concerning as media degradation is machine lifespan. There is only one working 3M Digital 32-Track machine in the United States. It is decades old; replacement parts are scarce; and technical expertise is specialized.

Each year that passes increases the risk of media degradation, the likelihood of hardware failure or the loss of engineers trained to operate these legacy systems.  Only a small number of engineers in the world are trained to operate and maintain a 3M Digital 32-Track machine. The process demands patience, technical knowledge, and a deep understanding of both analog tape behavior and early digital recording systems.

The most important takeaway from this project isn’t the artist name on the tape (though that was so cool to hear!). Instead, it’s that if you hold archival digital recordings — whether on 3M, DASH, DAT, ADAT, or early optical media — now is the time to assess and migrate them.  Obsolete digital formats are one hardware failure away from permanent silence.  We are so happy to have been able to send the content successfully and safely back to our customer.