Remove background noise with noise cancellation

Noise cancellation filters out unwanted background sounds during your calls in Cosmos. It helps deliver crystal-clear audio by automatically removing distracting noises like keyboard typing, fan humming, or ambient background noise.

How to enable noise cancellation

  1. Look at the bottom left of your Cosmos screen & click on the arrow beside your microphone icon.
  2. Click Audio settings   

  1. Scroll down to Noise cancellation   

  1. Pick the option that fits your situation:
    • Cosmos noise cancellation (Recommended) — removes background noise on your device, keeping just your voice. Best quality.
    • Browser noise removal (Lightest) — your browser's basic cleanup. The lightest option, works everywhere.
    • Unedited audio (Livestream) — your raw mic with echo cancellation only, best for music sessions and streaming.
  2. If you picked Cosmos noise cancellation, choose a Model  : Balanced (good removal, low power) is right for most rooms. Aggressive (stronger removal, sometimes robotic) is for genuinely loud environments. Start with Balanced.

  1. Click Test microphone  , record a sample, and play it back — you hear your voice through the option you selected. Switch between the models and keep the one that sounds clearer.
  2. From now on, you can flip noise cancellation on and off straight from the mic dropdown in step 1 — the toggle there shows which model is active.

[OPTIONAL] If there's steady background hum that never goes away, add the Noise gate   below the noise cancellation section — it opens your mic only while you speak.


Want to use your device's built-in noise cancellation?

Most systems have their own noise cancellation, and you can use it instead of the options above. Switch Cosmos to Unedited audio first — running two noise cancellations at once degrades your voice.


macOS (Macs from 2018 onwards, on macOS Monterey or later)

  1. Open Cosmos and unmute, so your mic is live.
  2. Click the mic icon that appears in the menu bar.

  1. Then, under Mic Mode, Choose Voice Isolation. macOS remembers it for Cosmos, so it stays on for your next call.

Windows

  1. Press Win + I, then go to System > Sound and select your microphone under Input.
  2. Turn on Voice Focus if your machine has it (Windows 11 24H2 and later). No Voice Focus? Look under Audio enhancements for a Voice clarity option and select it (the exact name depends on your audio driver).

iPhone and iPad

  1. Join a call in Cosmos, so your mic is live.

  2. Open Control Centre (swipe down from the top right), tap Mic Mode.

  3. Choose Voice Isolation.

Android

Most Android phones apply their own noise reduction to the mic automatically — there's no single switch to press. If your calls still pick up too much noise, search noisein your phone's Settings: some manufacturers expose their own controls there. Otherwise, Cosmos noise cancellation is the reliable option on Android.

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