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Video: Voice chat in the modem era? (Patreon)

Published:
2023-05-04 17:46:34
Imported:
2023-06

Content

https://www.youtube.com/watch?v=7mqkTFq7Ekg

This one was a real slog to produce. Took me three years! I'm pretty sure this is the finished version - first two RCs had some serious errors. I also suspect that some people will find the telephone audio portions unlistenable, but I'm not sure what I can do about that. Guess I'm taking feedback on that topic for a bit before I release this, but no guarantees that I can really figure out any solutions.

Files

Voice chat... in the modem era

Support me on Patreon: https://www.patreon.com/cathoderaydude Tip me: https://ko-fi.com/cathoderaydude

Comments

Anonymous

Don't know if you tried this already but I had a similar issue with a modem being able to pick up and dial but just getting silence over the line no matter what I did. I eventually figured out that near the phone jack there's some weird looking electrolytic capacitors that had started leaking and once I replaced them the modem started working. They look like little black rectangles and are laid down against the board

Strawberry Puptart

I don't need a telephone line tester. I don't need a telephone line tester. I don't need a telephone line tester...

Anonymous

Based on the block diagram at 41:09, ASVD does actually QAM the analog signal too, then shifts the phase of this signal out of the way of the digital signal before adding them together. I guess demodulation separates the two signals by their phase, and not really by any natural ignoring of the other as what would normally be noise.

Gecko089

Audio is actually fine, I expected much worse after your introduction. I rather think it more or less represents what you could expect at the time from strange devices like this.