An apparatus, comprising at least one programmable integrated circuit coupled to radio circuitry of a first device, the programmable integrated circuit being programmed to operate the first device to:
- receive a radio frequency (RF) signal at a first device, the RF signal conveying digital audio data and being transmitted directly to the first device from a second device, with the digital audio data being contained within the RF signal;
- measure one or more RF signal reception or transmission characteristics of the RF signal that contains the digital audio data, the one or more RF signal reception or transmission characteristics of the RF signal being measured as the RF signal arrives at the first device directly from the second device;
- then extract the conveyed digital audio data from the received RF signal at the first device;
- then produce modified digital audio data at the first device by internally modifying digital data of the conveyed digital audio data as it is received at the first device directly from the second device based on the measured one or more RF signal reception or transmission characteristics of the RF signal only as the RF signal arrives at the first device directly from the second device;
- then convert the modified digital audio data to an analog output signal;
- and
- then reproduce analog audio acoustic sound waves from the analog output signal.