Back in February Scotty H created this video spectrogram of the dial-up modem handshaking sound—the distinctive series of warbles and hisses that was once the soundtrack of connecting to the Internet. To find out exactly what the modem is “saying,” take a look at this detailed spectrogram infographic of the dial-up modem handshaking process by Oona Räisänen.
(see it larger)
via reddit
