--- title: Audio Signal Flow in Hub DSP description: A visual diagram showing how audio signals enter, travel through the built-in DSP processing, and exit the Catchbox Hub DSP Receiver. --- [Skip to content](https://help.catchbox.com/knowledge/audio-signal-flow-in-hub-dsp#main-content) - [Catchbox Plus](https://catchbox.com/plus-system) - [Case studies](https://catchbox.com/case-study/) - [Book a demo](https://explore.catchbox.com/book-demo?hsCtaTracking=26c83435-1828-4cad-b17a-14b537503736%7C17332728-d507-4382-827d-62d2279a4c0e) Open main navigation Close main navigation - [Catchbox Plus](https://catchbox.com/plus-system) - [Case studies](https://catchbox.com/case-study/) - [Book a demo](https://explore.catchbox.com/book-demo?hsCtaTracking=26c83435-1828-4cad-b17a-14b537503736%7C17332728-d507-4382-827d-62d2279a4c0e) - [Leave a Review](https://share.hsforms.com/2asY8tj1LSo2Wb24hR2X_GA292ev) [Leave a Review](https://share.hsforms.com/2asY8tj1LSo2Wb24hR2X_GA292ev) How can we help? - There are no suggestions because the search field is empty. 1. [Knowledge Base](https://help.catchbox.com/knowledge?hsLang=en) 2. [Product Setup](https://help.catchbox.com/knowledge/product-setup?hsLang=en) 3. [Product Setup](https://help.catchbox.com/knowledge/product-setup?hsLang=en#product-setup) # Audio Signal Flow in Hub DSP Here is a visual reference map showing how audio signals enter, travel through the built-in DSP, and exit the Catchbox Hub DSP Receiver. Use this diagram to plan input gains, signal routing, and output mixes for your room setups. [🔗 Download the file here.](https://v3.catchbox.com/files/audio-signal-flow) ![Audio Signal Diagram](https://help.catchbox.com/hs-fs/hubfs/Audio%20Signal%20Diagram.jpg?width=670&height=369&name=Audio%20Signal%20Diagram.jpg) #### **1. Audio Inputs & Gain Stage** **12 Available Input Channels** Accepts up to 4 Catchbox mics (Cube, Clip, Stick), 4 FLEX inputs (3-pin balanced), 4 Dante network inputs, AUX IN (3.5mm), and USB IN. **Input Gain Control** Every input channel (except USB IN) features gain adjustments (-20 dB to +20 dB in 5 dB steps).  #### **2. Internal Processing Paths** **12-Channel Automixer** Mixer that automatically prioritizes active speakers while attenuating idle mics. Applied to all Catchbox mics; FLEX and Dante inputs configured to **Microphone Mode.** **Feedback Suppression (In-Room Path)** Continuous 5 Hz frequency-shifting algorithm applied to local room outputs (MIXOUT 3-pin and RCA) to prevent room rings and feedback screech.  **AutoLevel (Video Call Path):** Volume-stabilizing algorithm applied to the USB OUT path to ensure consistent speech volume for online participants on Zoom,  Teams, etc. **Media Mode Bypass** External sources (FLEX, Dante, AUX) configured to Media Mode bypass the Automixer and voice processing entirely, passing raw line-level audio (such as presentation soundtracks) directly to the Mixer Matrix. #### **3. Outputs & Channel Cloning** **Mixer Matrix Outputs** Independent, customizable audio mixes assigned to 3-PIN MIXOUT L&R (balanced in-room), RCA MIXOUT (unbalanced in-room), and USB MIXOUT (video conferencing). **Direct Unmixed Outputs** Raw, individual microphone channels available on FLEX OUT and Dante OUT. **Output Channel Cloning** Mirrors any processed master mix (e.g., In-Room mix with Feedback Suppression or USB mix with AutoLevel) directly ontoFLEX OUT 1–4 or Dante OUT 1–4 ports. **Output Gain Stage** Output gain control (-20 dB to +20 dB) available across destination channels (except USB OUT).  - [Catchbox Plus System](https://help.catchbox.com/knowledge/catchbox-plus-system?hsLang=en#main-content) - [Overview](https://help.catchbox.com/knowledge/catchbox-plus-system?hsLang=en#overview) - [Hub DSP receiver](https://help.catchbox.com/knowledge/catchbox-plus-system?hsLang=en#hub-dsp-receiver) - [Hub features](https://help.catchbox.com/knowledge/catchbox-plus-system?hsLang=en#hub-features) - [Stick Mic](https://help.catchbox.com/knowledge/catchbox-plus-system?hsLang=en#stick-mic) - [Clip Mic](https://help.catchbox.com/knowledge/catchbox-plus-system?hsLang=en#clip-mic) - [Cube Mic](https://help.catchbox.com/knowledge/catchbox-plus-system?hsLang=en#cube-mic) - [System Firmware](https://help.catchbox.com/knowledge/catchbox-plus-system?hsLang=en#system-firmware) - [Product Setup](https://help.catchbox.com/knowledge/product-setup?hsLang=en#main-content) - [Product Setup](https://help.catchbox.com/knowledge/product-setup?hsLang=en#product-setup) - [Product Setup for Integrations](https://help.catchbox.com/knowledge/product-setup?hsLang=en#product-setup-for-integrations) - [How-to's](https://help.catchbox.com/knowledge/product-setup?hsLang=en#how-tos) - [Product Features](https://help.catchbox.com/knowledge/product-setup?hsLang=en#product-features) - [DECT Radio Protocol](https://help.catchbox.com/knowledge/product-setup?hsLang=en#dect-radio-protocol) - [Online Ordering & Shipping](https://help.catchbox.com/knowledge/online-ordering-shipping?hsLang=en#main-content) - [How to Order Plus System](https://help.catchbox.com/knowledge/online-ordering-shipping?hsLang=en#how-to-order-plus-system) - [Shipping](https://help.catchbox.com/knowledge/online-ordering-shipping?hsLang=en#shipping) - [Billing](https://help.catchbox.com/knowledge/online-ordering-shipping?hsLang=en#billing) - [Warranty & Returns](https://help.catchbox.com/knowledge/online-ordering-shipping?hsLang=en#warranty-returns) - [Microphone Customization](https://help.catchbox.com/knowledge/microphone-customization?hsLang=en) - [Troubleshooting](https://help.catchbox.com/knowledge/troubleshooting?hsLang=en#main-content) - [Technical Troubleshooting](https://help.catchbox.com/knowledge/troubleshooting?hsLang=en#technical-troubleshooting) - [Audio Quality Issues](https://help.catchbox.com/knowledge/troubleshooting?hsLang=en#audio-quality-issues) - [Mic Troubleshooting](https://help.catchbox.com/knowledge/troubleshooting?hsLang=en#mic-troubleshooting) - [Materials](https://help.catchbox.com/knowledge/materials?hsLang=en) - [Remote Control & Monitoring](https://help.catchbox.com/knowledge/remote-control-monitoring?hsLang=en) - [Beltpack Module](https://help.catchbox.com/knowledge/beltpack-module?hsLang=en) - [Discontinued](https://help.catchbox.com/knowledge/discontinued?hsLang=en#main-content) - [Catchbox Legacy Plus](https://help.catchbox.com/knowledge/discontinued?hsLang=en#catchbox-legacy-plus) - [Catchbox Mod](https://help.catchbox.com/knowledge/discontinued?hsLang=en#catchbox-mod) Copyright © 2026, Catchbox SIA