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Re:Alexa: Amazon's Operating System by hackmiester on Wednesday January 04, 2017 @02:12PM (#13321140)
The data is not sent to a server all the time - only when someone is using the device.

Source: tcpdump

Re:Alexa: Amazon's Operating System by joezydeco on Wednesday January 04, 2017 @10:26PM (#13324453)
Do you have a rough guess as to how compressed the outbound audio is?