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So they are always listening.
Not if 'Alexa' is the wake word.
Yes, if it has a "wake word" how does it know when the word is being said if it's off
For Echo devices there's a separate system that listens specifically for pre-programmed wake words only.
It's why you can't choose a custom wake word, but have to pick between "Alexa, Amazon, Computer, or Echo."
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