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http://open-source-soft.narod.ru/dtmf_cpp.7z DTMF detector and generator. Was used standard C++,so DTMF detector and generator completely cross platform.It used robust and reliable fixed-point algorithm, so can fast work on fixed-point architecture.

Project Admins:

• Viatcheslav Plyashkevich

[AdrianM]

Frame size, buffer size and sampling rate need to be adjusted so they fit a narrow margin, otherwise it won't work. Here are my values which work for me:
frame size 2, sampling rate 48000, buffer size 48.