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Modern inkjet printers can produce at least 1000dpi,
that 21 square inches of paper can carry 21,000,000 dots.
Let's say 10,000,000 to leave some spaces. That's on the
of a megabyte of data, ignoring colour information.
21 square inches is, roughly, the area of a vinyl single.
follows, therefore, that a record player equipped with an
optical sensor (and some simple lenses) ought to be able to
read a paper single printed with data in the conventional
track pattern, and reproduce the sound at reasonably high
quality. The head would track the data much as it does on a
CD. Equally, your very own desktop printer should be able
to download and print a PDF file which, when cut out into a
circle, can be played.
It's a shame to waste the colour information. Allowing for
printer variations, it should still be possible to quadruple (at
least) the storage density using colour. As a simple option,
and blue could be used to encode two channels of stereo.
[pocmloc, Oct 01 2019]
||//reasonably high quality// - 1MB for a single track implies some pretty heavy compression. This appears to be a clever and elaborate way to achieve poorer sound quality whilst simultaneously increasing cost, complexity and the chance of something going wrong.
||There's a late Victorian German printed gramophone record that was scanned and realised by an American researcher a few years ago.
||//pretty heavy compression// An MP3 is only about 3-4Mb, so
we're not far off, and the sound quality will be reasonable.
||//a clever and elaborate way to achieve poorer sound quality
whilst simultaneously increasing cost, complexity and the
chance of something going wrong// Thank you. I gave it my