How to make Microsoft Teams use a virtual microphone

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                          My goal is to alter my voice in a particular way and redirect it to MS Teams.

I managed to pipe my voice from my headphones microphone to a virtual microphone named wh40k like this: parec -d $PHYSICAL_MIC | sox $FILTERS | pacat -d $VIRTUAL_MIC.

In detail, this is my code:



    VIRTUAL_MIC="wh40k"
    # Hard-coded headphones microphone name which I got from pactl list
    PHYSICAL_MIC="alsa_output.pci-0000_00_1f.3-platform-skl_hda_dsp_generic.HiFi__Headphones__sink"
    
    # Check for required software: quit if any not found
    for CMD in parec sox pacat; do
        if ! command -v "$CMD" &>/dev/null; then
            echo "Error: $CMD not found.."
            exit 1
        fi
    done
    
    cleanup() {
        echo "Removing virtual microphone $VIRTUAL_MIC..."
        pactl unload-module "$MODULE_ID"
        exit 0
    }
    
    if ! pactl list sinks short | grep -q "$VIRTUAL_MIC"; then
        echo "Creating virtual microphone '$VIRTUAL_MIC'..."
        MODULE_ID=$(pactl load-module module-null-sink \
            sink_name=$VIRTUAL_MIC \
            sink_properties=device.description="$VIRTUAL_MIC")
        if [[ -z "$MODULE_ID" ]]; then
            echo "Error: could not create virtual microphone '$VIRTUAL_MIC'."
            exit 1
        fi
    else
        echo "Virtual microphone '$VIRTUAL_MIC' already exists."
    fi
    
    trap cleanup INT TERM
    
    echo -e "\nConfigurated sinks:"
    pactl list sinks short
    
    echo -e "\nConfigured sources (monitor):"
    pactl list sources short
    
    echo -e "\nConfiguring '$VIRTUAL_MIC' audio pipeline..."

    # $PITCH and other filters below are vars like "pitch -750"
    parec -d "$PHYSICAL_MIC" --raw --format=s16le --rate=44100 --channels=1 | \
        sox -t raw -r 44100 -e signed -b 16 -c 1 - -t raw - \
            $PITCH $OVERDRIVE $GAIN $REVERB $EQUALIZER $BASS $TREBLE $CHORUS $ECHO | \
                pacat --raw --device="$VIRTUAL_MIC".monitor

I can confirm that parec | sox works because I tested it with parec | sox | pacat and sox filters were correctly applied.

Now I can't use wh40k virt mic on MS Teams: when I select MS Teams > Settings > Devices > Microphone: Monitor of wh40k I can't hear my voice from the Teams test call.

Any clue on how could I troubleshoot this?

My versions:
 - MS Teams 1.5.00.23861 (64-bit)
 - Linux Mint 21 Kernel 
 - 6.8.0-40-generic
 - pipewire 1.2.7
                        
Asked by elmazzun (169 rep)
Jan 2, 2025, 09:59 PM
Last activity: Jan 5, 2025, 01:21 PM
How to make Microsoft Teams use a virtual microphone

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