Trillbit can convert any speaker into a data transfer device. Any device with speaker becomes a transmitter and any device with a microphone becomes a receiver.With that, we connect businesses and people to exchange proximity based, real-time information just over sound, without the need for any network, wifi or Bluetooth. Proprietary technology for Data over Sound.
http://220.127.116.11:8091/v1/ (Amazon Data Services Singapore) , https://bitbucket.org/trillbit/bpskdemodulation_c
Seem to think they are unique and novel in this tracking via audio space