The Just Add Power Sound Transceiver - model ST1 - is capable of sending or receiving stereo audio from a Just Add Power system. As a Transceiver, you begin by choosing whether it will act as a Transmitter or Receiver - an input or an output - and build the system accordingly.
As a Transmitter, the ST1 can:
As a Receiver, the ST1 can:
The ST1 Sound Transceiver can work in a 2G system or with 3G devices in 2G Mode, but requires a few settings to be applied.
2G Mode is automatically applied to the unit when loading firmware A6.5.9-LTS
Instructions to Set 2G/3G Mode manually can be found here
Standard 2G and 3G Receivers expect video and audio to be sent together. In their default state, a 2G Receiver will not process audio unless there is an accompanying video signal. To set a Receiver to accept audio without a video signal, send this command via the CLI of the Receiver:
astparam s a_force_dual_output y;astparam save;sleep 1;reboot
The unit will reboot and accept audio independent of video. This must be applied to every 2G Receiver in a system that wishes to listen to an audio-only signal from an ST1 or AVP Transmitter.