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Use the power of Linux and minimodem to hear modem sounds... And transmit a file — wirelessly! The future is now! Sender: $ cat /etc/passwd | minimodem --

Use the power of Linux and minimodem to hear modem sounds... And transmit a file — wirelessly! The future is now! Sender: $ cat /etc/passwd | minimodem --tx 300 Receiver: $ minimodem --rx 300

thedougd 5y ago
The DLP team did not anticipate this. ;)
Natsu 5y ago
LOL it's amazing that we've invented all this stuff and yet never just let our computers talk to each other without a wifi card or a phone or whatever else. We just needed a speaker and a microphone the whole time. How long before someone makes a phone app to just let two phones talk to each other to transmit a file? No, I don't care about your network, just let me access the speaker & microphone and beep at each other a little bit...
- Gracana 5y ago
  We used to use acoustic couplers to allow computers to talk using a handset, back when Ma Bell didn't allow you to plug directly into the phone line.
  - Natsu 5y ago
    Yeah, I remember them. But somehow we never let computers just talk to each other via sound, directly. Like humans do.
AceJohnny2 5y ago
It's apparently a college project in some Signal Processing classes to implement a modem over speaker/microphone from first principles. The way I heard it, the higher the bitrate, the better the grade.
kaliszad 5y ago
One could even play tunes using this by varying the baud-rate and the sleep length. #!/bin/bash cat /dev/zero | minimodem --tx 2400 & sleep 0.25; pkill minimodem cat /dev/zero | minimodem --tx 2400 & sleep 0.25; pkill minimodem cat /dev/zero | minimodem --tx 3600 & sleep 0.25; pkill minimodem cat /dev/zero | minimodem --tx 3600 & sleep 0.25; pkill minimodem cat /dev/zero | minimodem --tx 4000 & sleep 0.25; pkill minimodem cat /dev/zero | minimodem --tx 4000 & sleep 0.25; pkill minimodem cat /dev/zero | minimodem --tx 3600 & sleep 0.5; pkill minimodem Sorry it is out of tune, was just a quick try.

Use the power of Linux and minimodem to hear modem sounds... And transmit a file — wirelessly! The future is now! Sender: $ cat /etc/passwd | minimodem --tx 300 Receiver: $ minimodem --rx 300

thedougd 5y ago

The DLP team did not anticipate this. ;)

Natsu 5y ago

LOL it's amazing that we've invented all this stuff and yet never just let our computers talk to each other without a wifi card or a phone or whatever else. We just needed a speaker and a microphone the whole time. How long before someone makes a phone app to just let two phones talk to each other to transmit a file? No, I don't care about your network, just let me access the speaker & microphone and beep at each other a little bit...

Gracana 5y ago
We used to use acoustic couplers to allow computers to talk using a handset, back when Ma Bell didn't allow you to plug directly into the phone line.
- Natsu 5y ago
  Yeah, I remember them. But somehow we never let computers just talk to each other via sound, directly. Like humans do.

AceJohnny2 5y ago

It's apparently a college project in some Signal Processing classes to implement a modem over speaker/microphone from first principles. The way I heard it, the higher the bitrate, the better the grade.

kaliszad 5y ago

One could even play tunes using this by varying the baud-rate and the sleep length. #!/bin/bash cat /dev/zero | minimodem --tx 2400 & sleep 0.25; pkill minimodem cat /dev/zero | minimodem --tx 2400 & sleep 0.25; pkill minimodem cat /dev/zero | minimodem --tx 3600 & sleep 0.25; pkill minimodem cat /dev/zero | minimodem --tx 3600 & sleep 0.25; pkill minimodem cat /dev/zero | minimodem --tx 4000 & sleep 0.25; pkill minimodem cat /dev/zero | minimodem --tx 4000 & sleep 0.25; pkill minimodem cat /dev/zero | minimodem --tx 3600 & sleep 0.5; pkill minimodem Sorry it is out of tune, was just a quick try.