Facebook’s new feature will recognise and post news feed updates about the TV shows and movies we’re watching and the songs we’re listening to. It will only slurp up background sound if a user gives it the go-ahead. Head of security infrastructure for the social network explicitly told journalists that the new audio feature does not snoop on users and does not record conversations. The raw audio never leaves the phone, while the data about the match is only stored if the user opts to post it. The app cant identify background noise and conversation before it is enabled.”]
Source: https://nakedsecurity.sophos.com/2014/06/05/facebooks-new-audio-feature-wont-snoop-on-us-it-says/