How to Setup NoiseTorch AI Mic on Ubuntu

🎙️ How to Setup NoiseTorch AI Mic on Ubuntu

NoiseTorch is a free AI tool that removes background noise from your mic in real time. It works system-wide, so Zoom, Discord, OBS, or any app using your mic gets clean audio.

1. Download the latest release

Go to the official releases page:
https://github.com/noisetorch/NoiseTorch/releases

Download the x64 .tgz file (e.g., NoiseTorch_x64_v0.12.2.tgz) to your Downloads folder.

2. Extract the files

Open a terminal and run:

tar -xvzf $HOME/Downloads/NoiseTorch_x64_v0.12.2.tgz

This automatically extracts all files into the correct locations under your user directory ($HOME/.config/NoiseTorch). No moving is needed.

3. Check available microphones

Before running NoiseTorch, you can see all detected microphones:

pactl list short sources

Look at the second column, which is the mic name.
Take the starting part of the name (e.g., alsa_input.usb-MU900) for later use in the script.

4. Create the startup script

Save the following as $HOME/.config/noisetorch.sh:

#!/bin/bash
# NoiseTorch startup script with dynamic mic search and 75% noise suppression

# Set the starting string of your mic name here:
MIC_SEARCH="alsa_input.usb-MU900"  # <-- edit this to match your mic

VIRTUAL_MIC="NoiseTorch Microphone"

# Wait until PulseAudio is ready
until pactl info >/dev/null 2>&1; do
    sleep 1
done

# Dynamically find the mic that matches the search string
REAL_MIC=$(pactl list short sources | awk '{print $2}' | grep "^$MIC_SEARCH" | head -n 1)

if [ -z "$REAL_MIC" ]; then
    echo "No microphone found matching '$MIC_SEARCH'."
    exit 1
fi

echo "Found mic: $REAL_MIC"

# Start NoiseTorch in the background
$HOME/.config/NoiseTorch/noisetorch -i "$REAL_MIC" -s 75 &

# Wait for the virtual mic to appear and set as default
while ! pactl list short sources | grep -q "$VIRTUAL_MIC"; do
    sleep 1
done

pactl set-default-source "$VIRTUAL_MIC"
echo "NoiseTorch started with 75% suppression and set as default mic."

Make it executable:

chmod +x $HOME/.config/noisetorch.sh

5. Auto-start on login (Option A)

Add this line at the end of $HOME/.profile:

(sleep 5 && $HOME/.config/noisetorch.sh) &

- The sleep 5 gives PulseAudio a few seconds to start.
- The & runs the script in the background so login isn’t blocked.

6. How It Works

Waits for PulseAudio to start.
Finds the microphone that matches the search string you set.
Starts NoiseTorch with 75% AI-based noise suppression.
Creates a virtual mic and sets it as the default source for all apps.

✅ Works with any USB or built-in microphone, just update MIC_SEARCH to match your mic’s name.

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