Parlé VBC 2800 Audio Input and ALS

Audio Input Selection

Selecting a preferred audio input source is done using Biamp Camera Controller's settings. 

In Biamp Camera Controller version 1.8.0 and later, selections are available for USB audio, Auxiliary(analog), or USB + Auxiliary mixed. The default selection is "USB and Auxiliary".

The Biamp Camera Controller application does not provide additional audio level control for input sources. However, additional analog input gain and level control for VBC 2800 audio sources are available through the Network command API.

Note: the microphones will remain active via a USB connection while Auxiliary is selected. 

ALS Source Selection

In Biamp Camera Controller version 1.8.0 and later, selection signal fed to the ALS output has been added. 

Select ALS audio source from  4 choices - Disabled, Far End Only, Near End Only, or Far and Near End Mix. This will determine the source that is fed directly to the ALS analog output. The default selection is "Audio Source Only".

Source Routing is determined by the selection in Biamp Camera Controller, or via Network command API. The chart below shows the signal routing based on selection. 

Cabling and Connectivity

Analog output (ALS) is the same as the Parlé VBC 2500a bar. However, the VBC 2800 models add support for a mono unbalanced analog input, accessible through an additional pole on the 3.5mm (1/8^th inch) connector which is now TRRS format. User controls available in Biamp Camera Controller for this audio input will include input trim to normalize the analog in level to the USB audio in level.  

Single devices (either Audio In or Out) may be plugged in directly to the Audio I/O port without using the Y cable. 
Note: The Audio I/O "Y" cable is configured to carry both signals at the same time. 

• Plug the Y cable into the Audio I/O port and route the cable through the cable retainer. 
• Plug the exterior device cable into the appropriate end of the Y cable. 
• If a standard 3.5mm (1/8^th inch) connector is used without the "Y" cable, the signal from the bar will be the ALS output only.

Note: "Y" cable is only compatible with VBC 2800 conferencing bars. The VBC 2500a only supports ALS output on a 3.5mm standard connection. 

Wiring Diagrams

Note: Stereo Audio source connection using premade 3.5mm cables will only pass left-side audio to the bar through an adapter. This left channel audio will play through speakers in mono.