[taylor-tg]

There are only ~11 states that require all-party consent to record, and most of the states state that the law only applies to telephone/wire recordings. On top of that, the states who are all-party consent generally specify that public conversations are not protected under the law.

[JimmyAustin]

Not to mention he wouldn't necessarily be recording, just logging time where the amplitude of the signal was over a certain threshold.