vintage reel to reel tape recorder, open reel audio recorder

I was told I was buying used reel-to-reel tape for audio purposes. What turned up were data reels seemingly off of an old computer. Any idea what might be on them? The

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I Fixed Up a Vintage Reel-to-Reel Tape Machine sort of

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I found this vintage reel to reel recorder at a thrift store and made a FREE DECENT SAMPLER LIBRARY

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Revox A-77 open-reel tape recorder

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