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Catchbox Plus With 8 Microphones (Daisy-Chaining Two Hubs)

Step-by-step guide to setting up the Catchbox Plus system with 8 microphones using two daisy-chained Hub receivers.

What will you get?
Audio flows diagram
What will you need?
Step-by-step instructions
Wiring and mix diagram

What will you get?

  • Eight Catchbox microphones automixed on a single audio feed for video-conferencing.

*All audio flows mixed and managed from Catchbox Hub DSP

Audio flows diagram

scenario3 Diagram

What will you need?

  • Two Catchbox Plus systems with microphones 

NB! IN this scenario we will use the following naming for the Hubs:

Primary - connected to the video-conferencing computer
Secondary - connected to the Primary
  • Catchbox 3pin-to-3pin cables - 4 pcs (purchased separately)
  • Video-conferencing computer

Step-by-step instructions

1. Ensure all Catchbox mics are paired with the Hub.

  • In most cases, the mics are pre-paired before shipping. However, if pairing is required, follow the instructions in this Knowledge Base article.

2. Connect the cables

  • USB for Primary - connect your Primary Hub DSP to your video-conferencing computer using the included USB-C cable to provide power and audio connection.
  • USB for Secondary - connect your Secondary Hub DSP to a power source using the included Catchbox USB-C Power Adapter
3. Configure your Primary Hub
  • Configure FLEX ports to operate as inputs

GLOBAL SETTINGS → SYSTEM → FLEX MODE → INPUT

  • Configure all FLEX ports to MICROPHONE MODE

IN → FLEX → FLEX 1..4 → CHANNEL SETTINGS → MICROPHONE MODE

Note: It is recommended to route the microphone signals via the Automixer (MICROPHONE MODE). If your external device is a media signal (music, soundtrack etc), it is recommended to route it bypassing the Automixer (MEDIA MODE).

 

  • Configure audio mix for video-conference on USB OUT (MIXOUT)

OUT → MIXOUT → USB OUT → CHANNEL SETTINGS → MIX CONFIGURATION → 

  • MIC  1–4, ENABLED
  • FLEX IN 1-4 ENABLED

NB! Disable all other signals.

  • Due to subsequent digital-to-analog and analog-to-digital audio signal conversion, the audio levels are slightly different between the mics on the Primary Hub and mics on the Secondary Hub and thus it is recommended for daisy-chaining Catchbox microphones to set Input Gain settings for all FLEX inputs to -5dB

OUT → FLEX → CHANNEL SETTINGS → GAIN → -5dB

4. Configure your Secondary Hub
  • Configure FLEX ports to operate as outputs

GLOBAL SETTINGS → SYSTEM → FLEX MODE → OUTPUT

  • Make sure that for all FLEX output channels the “CHANNEL CLONING” setting is “DISABLED” 

OUT → FLEX → CHANNEL SETTINGS → CHANNEL CLONING -> DISABLED

5. Connect the audio cables in both Hubs

  • Before connecting the cables - disconnect the USB power from both Hubs

NB! There is no risk of losing the saved settings - the Hubs will store them in the permanent memory that is not erased by power cycling.

  • Connect the 3pin connectors - use Catchbox 3pin-to-3pin cables to connect FLEX 1 port on the Primary with FLEX 1 port on the Secondary, FLEX 2 on Primary with FLEX 2 on Secondary and so on.
  • Connect the USB connectors to power both devices.

6. Configure your video-conferencing computer

  • In the computer's audio settings select “Catchbox Hub DSP” as a source of "Microphone" and “Loudspeaker” (depending on the OS).
  • In the video-conferencing platform’s audio settings  select “Catchbox Hub DSP” as a source of "Microphone" and “Loudspeaker” (depending on the platform).

Wiring and mix diagram

 scenario3 Wiring