Transceiver effects are simple to use but also very powerful, and allow you to break the normal rules that govern how buses, tracks, and events can be routed in FMOD Studio.
A transceiver effect can be set to transmit or to receive, and can be tuned to any of 32 different “channels.” A transceiver effect that’s set to transmit is a bit like a send, while a transceiver effect that’s set to receive is a bit like a return bus: A transceiver effect instance that’s set to transmit sends a duplicate of the signal at its position to every transceiver effect instance that’s set to receive and is tuned to the same channel.
This means that if you put a transceiver effect set to “transmit to channel 4” in your “A” event, and a transceiver effect set to “receive from channel 4” in your “B” event, every instance of your “B” event will include the signal from every instance of “A” in its mix.
So, if you have four instances of your “A” event playing simultaneously, and one instance of your “B” event, the “B” event instance will output a mix of the signals from all four of your “A” event instances. Conversely, if you have one instance of your “A” event, and four instances of your “B” event playing simultaneously, each of those “B” event instances will output its own copy of the output of the “A” event instance.