Feedback Suppression Explained

Feedback Suppression is an internal algorithm designed to prevent the loud, high pitched whistling or screeching sounds that occur when a microphone picks up its own audio from a nearby loudspeaker.

Where on the Hub can you find this?

Feedback Suppression is managed within the OUT (Output) section for analog and digital in-room paths:

For RCA
OUT -> MIXOUT -> RCA -> Output Settings -> Feedback Suppression

For 3-PIN
OUT -> MIXOUT -> 3-PIN -> Output Settings -> Feedback Suppression

What is it for and why?

A feedback loop happens when sound from the room's speakers enters the microphone, travels through the Hub, and is amplified out of the speakers again. If the volume is high enough, the sound trapped in this loop feeds back on itself and intensifies, resulting in that piercing whistle.

In many classroom and meeting room setups, speakers are located on the ceiling or behind the presenter. This layout makes feedback almost impossible to avoid through physical placement alone. This feature provides a digital buffer that allows the system to function without technical issues.

When is it Useful?

Increasing Gain Before Feedback: By enabling this algorithm, you can safely turn up your microphone Gain or speaker volume higher than you normally could without the system whistling. This is essential for ensuring presenters are heard clearly in large rooms.

Unsupervised Spaces: It is highly recommended for rooms where there is no dedicated sound technician to monitor levels, as it automatically protects the audience's ears from sudden feedback.

Note: Feedback suppression is only applied to in-room outputs (RCA and 3-PIN). It is not active on the USB path, as remote participants are not physically in the room and cannot trigger a local feedback loop.

Factory/Default setting

Enabled for the analog MIXOUT paths to ensure a safe user experience out of the box.