Data Via line-in/out? possable?

[Fenderian_Mayhew]

I remember hearing older computers had cassette interfaces which allowed data to be stored on tape.
flie.ext>/audio/device/out
/Audio/Device/in > file.ext
is this still doable with modern systems?
is there a program which can form data into wav files.
Googleing about cassettes, data and storage boils down to mp3ing old audio cassettes. which is not what im looking for.
the only thing i could find that was close was
cat /file/path.here | psdsp tee /dev/audio > /dev/null
which makes a noise based on the data. and taping the audio is easy but how does one feed the audio back to data? (if at all )

[Fenderian_Mayhew]

im essentaly trying to store a jpg on a cassette and be able to recover it.

[grahammechanical]

Magnetic tape was used for data storage long before the tape cassette was thought of. In fact tape storage is still used in some cases.

https://en.wikipedia.org/wiki/Magnetic_tape_data_storage

What hardware device are you thinking of using?

Regards.

[kurja]

If you have ye olde tape recorder at hand, there are ham/sstv packages for ubuntu that you might have success with, such as http://users.telenet.be/on4qz/qsstv/manual/_t_x_s_s_t_v.html (http://users.telenet.be/on4qz/qsstv/manual/_t_x_s_s_t_v.html?) ?

[The Cog]

You need to know the terminology to be able to google it. This seems to work OK: https://www.google.co.uk/search?q=audio+software+modem
Lots of the links look interesting. There are some youtube videos, and in particular something called minimodem might be what you are looking for.