DTMF Encoder Decoder is very easy to use the program to decode DTMF dial tones found on telephone lines with touch-tone phones. • DTMF is the global standard for audible tones that represent the ...

Unfortunately the available memory on Microcontrollers is quite restricted and we do not get very far by storing a (uncompressed) WAV file e.g. in program/flesh memory, so I started to look into ...