Abstract: A system and method effective to trigger precisely timed actions on computing devices. The system may include a transmitting device and a receiving device. The transmitter may modulate binary data into sound waves, and the receiver may demodulate the audio signal into binary data. Signal amplitude across a range of frequencies may be used to demodulate. The received data may be interpreted in order to trigger actions on the computing device. These actions may involve the device's screen, speaker, built-in lights, camera, or vibration function. The actions may change over time based on the time at which the signal was received. More actions may be loaded from the device's storage.

Abstract: A system and method effective to trigger precisely timed actions on computing devices. The system may include a transmitting device and a receiving device. The transmitter may modulate binary data into sound waves, and the receiver may demodulate the audio signal into binary data. Signal amplitude across a range of frequencies may be used to demodulate. The received data may be interpreted in order to trigger actions on the computing device. These actions may involve the device's screen, speaker, built-in lights, camera, or vibration function. The actions may change over time based on the time at which the signal was received. More actions may be loaded from the device's storage.