Parse (extract) DTMF in Python
Do an FFT on the data. You should get spikes at the frequencies of the two tones.
If I have a recorded audio file (MP3), is there any way to get the figure out the DTMF tones that were recorded in pure Python?
(If pure python is not available, then Java is okay too. The point being that it should be able to run in Google Appengine)