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I happen to have met the hardware engineers who developed the chipset and microphone array PCB inside the Echo and they told me there is no recording unless the

I happen to have met the hardware engineers who developed the chipset and microphone array PCB inside the Echo and they told me there is no recording unless the trigger word is detected. I saw no evidence to prove or disprove this and there's nothing to say that the device couldn't be altered after installation. [edited: grammar]

jessaustin 10y ago
Once upon a time this behavior would have been determined by hardware. For a device developed this decade, however, there's no way that a PCB design would determine this. Rather, this behavior is determined by the firmware loaded onto the microcontroller. Even if one didn't know that, the fact that the trigger word is easily changed by the user should indicate that everything is in software.