Client devices periodically capture ambient audio waveforms and modify their own device configuration based on the captured audio waveform. In particular embodiments, client devices generate waveform fingerprints and upload the fingerprints to a server for analysis. The server compares the waveform fingerprints to a database of stored waveform fingerprints, and upon finding a match, pushes content or other information to the client device. The fingerprints in the database may be uploaded by other users, and compared to the received client waveform fingerprint based on common location or other social factors. Thus a client's location may be enhanced if the location of users whose fingerprints match the client's is known, and, based upon this enhanced location, the server may transmit an instruction to the device to modify its device configuration.
