91.6.1.7 Axia GPIO

Livewire is an audio-over-IP system created by Axia Audio, a division of The Telos Alliance. Its primary purpose is routing and distributing broadcast-quality audio in radio stations.

Most audio these days needs associated control. A delivery system needs a start input at minimum, but could well benefit from a richer control dialogue such as text identifying what is playing that can be sent to the studio mixer and to the HD Radio and RDS encoders. Satellite receivers have control outputs. Telephone systems need dialing, line status, hold, transfer, etc. Even a simple CD player needs ready indication out and start in. Even the simplest source, a microphone, needs to convey on/off status for the air lights. Most conventional controls have been done with primitive GPIO parallel “contact closures.” As a first step, Ethernet can transport GPIO data, reducing and simplifying cabling, and Livewire+ offers this basic capability to replicate traditional start/stop control. But it continues from there; Livewire+ also supports sophisticated remote operation of studio equipment over Ethernet which allows the network to transport much more advanced information than just simple start commands. 

Etere’s implementation of AXIA has so far been to meet our customer’s specific needs.

Use AXIA GPIO

- IP: Set the IP of AXIA device

- Port: Set the port of AXIA device

- Open/Close: Simulate opening and closure of Axia device. Only for test purposes since the open signal is given from Radio Engine when goes onair.

ON/OFF: these are channel A and B labels that indicate il the channel is active or not. Their use case is primarily on debug or configuration.

Tabs CH-A, CHB

ON/OFF Command to send when:
Channel A On ....................: GPI 2 Hxxxx , GPI 2 Lxxxx
Channel A Off ...................: GPI 2 xHxxx , GPI 2 xLxxx
Channel B On ....................: GPI 3 Hxxxx , GPI 3 Lxxxx
Channel B Off ...................: GPI 3 xHxxx , GPI 3 xLxxx

START/STOP Command to receive for:

START Channel A On ....................: GPO 2 HLHLH
STOP Channel A Off ...................: GPO 2 LHHHL
START Channel B On ....................: GPO 3 HLHLH
STOP Channel B Off ...................: GPO 3 LHHHL

GPIO Status
logs of commands sent and received from the GPI