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From Vinyl to Streaming: How music formats shaped our world
Twenty Thousand Hertz
The History of Portable Music Players
The first portable music player that really took off was the 8-track. If you know where those sounds come from, submit your guess at mystery.20k.org. Anyone who guesses it right will be entered to win a super soft 20,000 Hertz T-shirt. And here's a chance for you to win $1000 with this second challenge. Can you guess which company developed the 8-tracks? I'm going to go with Sony.
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