Hub Receiver With Built-In Dsp; Connectivity Options; Hub Dsp Capabilities; Automixer - Catchbox Plus User Manual

3. Hub Receiver with built-in DSP

The Hub receiver with a built-in DSP is the central component of the Catchbox Plus system, designed for
seamless connectivity and control of the wireless microphones. It is available with 2 or 4 channel microphone
connectivity, each available with or without the Network.
The Hub features an integrated DSP with a mixer and audio processing capabilities, and o ers a mixed output
through a balanced 3-pin connector. It can mix and route audio signals from transmitters, USB sources, and
AUX inputs to various outputs, potentially replacing a separate mixer and simplifying the setup process.

3.1 Connectivity Options

DANTE: For advanced audio networking, providing separate unmixed channels and allowing for custom
processing and mixing in an existing DSP.
3-pin Euroblock connectors: provide separate unmixed channels, supporting individual channel processing.
USB: Functions as an input, output, and power source, o ering exibility for audio connections.
Aux In: an additional input option for external audio sources.

3.2 Hub DSP capabilities

The integrated DSP includes a mixer and advanced audio processing capabilities.
Mixed Output through a balanced 3-pin connector for reliable audio transmission to external audio systems.
Ensures consistent audio output without the need for manual adjustments.

3.2.1 Automixer

1.
Activates the microphone of the person currently speaking.
2.
Quietly lowers the volume of other microphones to reduce background noise, echoes, and feedback.
3.
Maintains a consistent overall sound level when multiple people are speaking simultaneously,
preventing feedback.

3.2.2 Auto EQ and Auto Level

Auto EQ adjusts bass frequencies and balances sound levels based on the speaker's voice and microphone
characteristics, ensuring clear audio and avoiding issues like boominess or nasal tones.
Auto Level adjusts the overall volume to ensure it is not too soft or loud for the far end, maintaining clear and
consistent audio without the need for manual adjustments.

3.2.3 Echo Canceller and Howling Limiter

Echo Canceller gently lowers the volume of microphones when the far end is speaking and reduces incoming
audio when someone at the near end (in the room) is talking. This prevents echoes and ensures clear two-way
communication.
Howling Limiter protects against feedback by spotting and controlling the screeching noise that occurs when
sound from a speaker re-enters the microphone.

3.2.4 Feedback Suppression

Further reduces feedback during voice-lift by slightly and continuously changing the pitch of the ampli ed
sound and helping to prevent feedback.

3.3 Processing Paths

The Hub DSP Receiver supports two processing paths. Automixing is performed on all connected Catchbox
microphones before splitting into these paths.
1. Far-end/USB Audio path: Available on USB output. Maintains clear, dynamic audio for remote participants,
minimizing noise and peaks to prevent videoconferencing fatigue.
2. In-room audio path: Available on mixed 3-pin Euroblock, RCA, and DANTE output.Crucial for unattended
spaces requiring voice-lift. It minimizes acoustic feedback risks caused by room imperfections or user error.
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