how does the trigger word work?

[mreinstein]

@StevenHickson cool automation suite!

I'm wondering, how do you detect when someone says the trigger word ("pi") ?

is PiAUISuite sending all data to google voice, and using that? Or are you using some local speech rec just to pickup on the key word and start sending audio data to google speech after the keyword is found? I would think that streaming everything to google voice would get quite expensive in continuous mode.

Any info on this would be greatly appreciated! :)