surely shazam will realize when one IP address is responsible for 1000x a usual person's bandwidth?
or, given Pixel phones can identify audio in the background seemingly without impacting battery, are modern algorithms for identifying music from audio so efficient that shazam pays almost nothing per clip?
Yes, it essentially just runs a perceptual hash algorithm on the audio and finds the closest matches in a database.
At least with the recent Pixels there's an option to have your phone listen 24/7 and tell you what music is playing. Probably difficult to distinguish this tower from a homeless guy sitting in a subway station listening to different music all day.
Since the audio is sent to the creator’s server first, they could call Shazam from any number of rotating IPs. It’s a pretty future-proof design!