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I still don’t think companies serve you ads based on spying through your microphone
(simonwillison.net)
This is a most excellent place for technology news and articles.
And a much smaller footprint. It could even be binary data for tweaking your algorithmic profile, say the name of a branded product or in the case of a product with few options just the type of item. Audio runs in the megabytes per minute, transcripts in the kilobytes, but reducing to a conclusion of interest in a single specific item is really very small, hard to notice tbh.