Where does this come from, and can I check it?

Sony's 1979 player put a stereo cassette in a pocket. The figure is taken from Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

Is this really a music fact?

Yes. It sits on the Music shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

What else can I read about it?

The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

The Walkman moved music into the street

Sony's 1979 player put a stereo cassette in a pocket Personal listening had existed before, but the small player plus headphones made private sound normal in public. It changed how albums were mixed, with more emphasis on detail that survives headphones. Portable music has been shrinking ever since. It sits in Mondo's music collection, one of 200 facts that each trace back to the reference below.

Where this comes from

Britannica

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

Go further

Technology trivia

More facts like this

The Walkman put music in people's pocketsSony's TPS-L2 went on sale in Japan in July 1979 and changed listening The Minimoog made synthesizers portable enough for bandsThe 1970 model folded a whole modular patch into one wooden case The iTunes Store sold single tracks, not just albumsIt opened in 2003 and made buying one song a normal thing to do Stereo was patented in 1931Alan Blumlein described two channel recording years before anyone sold it One valve microphone defined the studio soundThe Neumann U47 has been behind countless vocal recordings since 1947 Voltage control made synthesisers playableRobert Moog's modular system of 1964 let a keyboard shape a generated tone

Tags: portable, history, listening

The Walkman moved music into the street: the short answers

Where does this come from, and can I check it?: Sony's 1979 player put a stereo cassette in a pocket. The figure is taken from Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a music fact?: Yes. It sits on the Music shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.