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PC Connection

The DX series is designed to work with any communication software running on the computer. From videoconferencing applications like Zoom or Google Meets to SIP line receiving software such as Linphone. The telecommunications channel allows sending a differentiated return feed (mix-minus) to the computer via USB-2, where the computer’s own audio (USB-2 playback) is not mixed in, preventing feedback loops. The computer can be added to conference calls managed by the Telecommunications channel.
While communication software typically has built-in cancellation mechanisms, these systems often become desynchronized, creating echoes and audio artifacts. A mix-minus send is essential for reliable communications.
USB-2 is non-operational if USB-1 is not connected to an active port.
If USB-1 and USB-2 are connected to two different PCs, USB-2 will not function when the USB-1 PC is powered off.
(Typically USB-1 connects to the 24/7 on-air PC).

Basic Configuration

1

Microphones

Assign microphone channels to PGM and REC.
2

USB-2 Channel

Assign to PGM and remove from REC.
3

Telco Channel

Set PGM-REC selection to PGM
4

Computer

Configure the application with USB-2 audio device as input/output (microphone and playback).
5

ON-AIR

The application audio enters the console via the USB-2 Channel and goes on-air with microphone return (via REC).
The application may be handling a single call or a multi-participant chat. This does not affect console operation.

Phone/Cell Conference (Vox-IP)

1

Microphones

Assign microphone channels to PGM and REC.
2

USB-2 Channel

Assign to PGM and remove from REC.
3

Telco Channel

Set PGM-REC selection to PGM.
Activate the VOX-IP button. Phone/cell return is sent to PGM-2 via REC (visible on REC VU meter).
4

Conference

Raise the Telco fader to mix phone calls on-air; all participants become interconnected.
For return feed to computer (REC), do not assign music beds; only route MICs.
Priority/AGC systems in communication applications may attenuate remote voices when local audio (background music) is present.