There's an article on developerworks that might help...it uses perl to control sndpeek which does the hard work of analyzing the audio for you, the project reacts to sequences of tones :-)

http://www.ibm.com/developerworks/linux/library/os-whistle/index.html

In reply to Re: Matching Incoming Audio Tones by ByteFreak
in thread Matching Incoming Audio Tones by KyleYankan

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