Web sites related to DTMF tones.
A whole bunch of well known tunes transcribed
quick explanation of DTMF and related standards recommendations
DTMF Generator, and many other DSP related
software includng many cook applets. Free
source code, too.
How to build your own DTMF Generator gadget
DTMF Decoders, relay conrtrols, and computer interfaces.
Off-the-shelf products that allow use of DTMF tones for
control, interface to computer systems, remote control
of relays, and data display.
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