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Member's Forum I like how this sounds, but then again, I probably wouldn't
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  • Replies 29 replies
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  • audio compression
  • cassette tape
  • mp3 to cassette tape
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I like how this sounds, but then again, I probably wouldn't

stanto
stanto 10 months ago

It's 3:30am and I've finished fighting with the Baldur's Gate 3 toolkit to edit a mod I'm working on, and a thought hits me.

Wouldn't it be funny to store music on a cassette?

No, not like that.

I'm talking about, digital music. Take say, an MP3 or equivalent, potentially lossy compression audio format - because it would be funnier. Then create an audio file at a low bitrate, depth and frequency. Then have write it to a cassette tape, like in the ZX Spectrum / Commodore 64 days.

Then play it back and decode it on the fly!

I believe it would be an interesting juxtaposition of technology while being a challenge to get the most out of the compression and data rates, and handling errors on the way. Resulting in a pretty hilarious audio file.

Consider it an art piece.

I wonder what the bill of materials would look like for that? I still have some as-new cassettes lying around...

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Top Replies

  • jc2048
    jc2048 10 months ago +7
    If you want an idea of the circuitry that was originally used in these kind of interfaces, this is a cassette tape interface I built around 1979. I think it might have been based on a Don Lancaster design…
  • jc2048
    jc2048 10 months ago in reply to jc2048 +4
    He included the 'Bit Boffer' in his TV Typewriter Cookbook. So that's where I came across it. Would it work if stanto simply took the analogue bits (with maybe an actual comparator on the input to the…
  • shabaz
    shabaz 10 months ago +2
    BoM could be as low as a sound card and a PC, or a Raspberry Pi (assuming a cassette recorder/player already exists). There are codecs like FreeDV which have a chance to be usable if you're looking for…
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  • beacon_dave
    beacon_dave 10 months ago
    stanto said:
    Then have write it to a cassette tape, like in the ZX Spectrum / Commodore 64 days.

    The likes of the BBC micro used the 'Computer Users Tape Standard' (CUTS) to record to cassette which appears to have been around 1200baud. 

    https://en.wikipedia.org/wiki/Kansas_City_standard#Enhancements

    Not sure how the ZX Spectrum / Commodore compared, but I don't recall them being any faster to load.

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  • beacon_dave
    beacon_dave 10 months ago in reply to beacon_dave

    CUTS used two tones, but you could use more.

    If DTMF had been faster, then perhaps that could have been an interesting approach.

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  • beacon_dave
    beacon_dave 10 months ago in reply to beacon_dave

    CUTS used two tones, but you could use more.

    If DTMF had been faster, then perhaps that could have been an interesting approach.

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