After months of revelations and apologies, all the major smart assistant makers have revamped how they handle human review of audio snippets. Amazon Alexa, Google Assistant, Apple Siri, and Microsoft Cortana were all using third-party contractors to transcribe and vet recorded snippets, adding some human brain power to underlying machine learning algorithms. But the backlash over the lack of transparency spurred new customer controls. And with the release of Apple's iOS 13.
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