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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…
Parents
  • beacon_dave
    beacon_dave 10 months ago

    Rewind to the 80's Slight smile when magnetic tape was being used for all sorts of things but usually with some specialist hardware to bypass the consumer analogue inputs/outputs and without the modern digital compression schemes.

    Philips tried to market a 'Digital Compact Cassette' device commercially in the early 1990's, presumably hoping that the backward compatibility with analogue cassette tapes would give them an advantage over MiniDisc but both appeared to lose out to DAT.

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

    I recall that there were some lower end multitrack recorders on the market (late 80's) that used all four tracks of the standard compact cassette simultaneously (no tape flipping) allowing you to play tracks back whilst recording to another, to build up a mix old school. If you can get hold of one of them then you could perhaps increase your data throughput.  

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  • shabaz
    shabaz 10 months ago in reply to beacon_dave

    Minidisc got me through a couple of years of post-uni study : ) For various reasons, I didn't manage to turn up to lectures often, so I purchased two devices, and a friend would record the lectures and snail-mail them to me every few days. Was quite fun, my friends would whisper gossip to me, interspersed with the lectures, so that I wouldn't feel like I was missing out. Minidisc was really excellent technology as far as I was concerned. And they found a few niches e.g. the smaller radio stations would use them for recording programs, since they were relatively low-cost and had good-enough audio.

    But then MP3 players came along too quickly, everyone wanted the iPod.

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  • shabaz
    shabaz 10 months ago in reply to beacon_dave

    Minidisc got me through a couple of years of post-uni study : ) For various reasons, I didn't manage to turn up to lectures often, so I purchased two devices, and a friend would record the lectures and snail-mail them to me every few days. Was quite fun, my friends would whisper gossip to me, interspersed with the lectures, so that I wouldn't feel like I was missing out. Minidisc was really excellent technology as far as I was concerned. And they found a few niches e.g. the smaller radio stations would use them for recording programs, since they were relatively low-cost and had good-enough audio.

    But then MP3 players came along too quickly, everyone wanted the iPod.

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  • beacon_dave
    beacon_dave 10 months ago in reply to shabaz

    I had access to a rackmount MiniDisc recorder for a while but by that stage I already had access to solid state audio field recorders, so it was more of a historical curiosity by then, even though they were still being sold up until around 2013.

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