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Is there any way to trigger an Automator action with a sound? I'd like to be able to record a sound and trigger an action every time my computer's microphone receives the sound.

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Do you mean that Automator recognizes a sound that is coming from a microphone? –  Martín Marconcini Oct 26 '10 at 7:04
    
@Martín I think he means when mac heard a sound run some automator script. –  Am1rr3zA Oct 26 '10 at 9:48
    
@Am1rr yes but… from what I understand he wants it to be a “specific” sound recorded by him, which would be very difficult on its own. –  Martín Marconcini Oct 26 '10 at 13:26

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Mac OS X comes with speech recognition (check System Preferences > Speech panel) but it can't easily recognize a generic sound, only built-in commands.

Now, it is possible to make an automator action or script that is triggered by an arbitrary phrase. However, if by "sound" you mean a beep, blip, crash or other sound that can't be recognized as a string of phonemes (ie. speech in english or possibly another language) then we're into serious Objective C programming territory here.

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Not even Objective C, that will require a very decent knowledge of C and low level sound analysis algorithms. My head hurts and I only imagined it. –  Martín Marconcini Oct 26 '10 at 15:49

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