Mozzi Synth DTMF Call Progress Tone Generator

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=m8xOpIFWfZg

DTMF call progress tones can be generated by playing multiple sine waves simultaneously. • The Mozzi synth library for Arduino is used here with an ESP8266 to generate the dial tone, busy signal, ring signal, and off hook sounds heard in a POTS telephone line. • ESP8266 pcb used in demo: https://github.com/GadgetReboot/Remot... • Sketch: https://github.com/GadgetReboot/DTMF_... • Mozzi synth: • https://github.com/sensorium/Mozzi • https://sensorium.github.io/Mozzi/lea... • Call progress tones: • https://en.wikipedia.org/wiki/Call-pr... • https://en.wikipedia.org/wiki/Off-hoo... • Plain Old Telephone Service: https://networkencyclopedia.com/plain... • Telephone Exchange: https://en.wikipedia.org/wiki/Telepho... • If you'd like to support the channel, you can: • Support me on Patreon: / gadgetreboot • Shop through my affiliate links! • Banggood https://www.banggood.com/custlink/3vK... • Aliexpress https://s.click.aliexpress.com/e/_AFeHwB • Amazon.com https://www.amazon.com/? _encoding=UT... • Amazon.ca https://www.amazon.ca/? _encoding=UTF...

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