Désactiver les microphones par Regex

"J'avais besoin d'un moyen de désactiver le micro de ma caméra avec PowerShell...
Ça m'a pris genre 4 heures et du gatorwine🍷.
Alors ouais — regardez pas ça de trop près."
— Mat Ice, 2025

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Ce que ça fait

Ce script PowerShell recherche tous les appareils microphone sur votre système Windows, trouve ceux dont le nom correspond à un pattern regex, et les désactive directement dans le Registre Windows.

C'est plus fiable que d'essayer de les désactiver via PnP ou le Gestionnaire de périphériques quand on travaille dans des environnements verrouillés ou gérés.

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Comment ça fonctionne

1. Définir un pattern Regex

   $regexPattern = "Logi C270"

   Cela indique au script quels microphones chercher.
   Vous pouvez remplacer "Logi C270" par n'importe quelle partie d'un nom de microphone.

2. Énumérer les périphériques audio

   Get-PnpDevice -Class AudioEndpoint -FriendlyName "*Microphone*"

   Trouve tous les périphériques de capture avec « Microphone » dans leur nom.

3. Filtrer par Regex et désactiver

   Pour chaque correspondance, le script trouve son GUID dans le registre et définit la valeur
   DeviceState à 0x10000001, le désactivant effectivement.

4. Gestion gracieuse des erreurs

   • Avertit si aucun périphérique ne correspond au pattern
   • Vous informe si vous n'exécutez pas en tant qu'Administrateur
   • Compte le nombre de périphériques désactivés avec succès

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Prérequis

• Windows
• PowerShell 5.1+
• Privilèges Administrateur
• Un peu de patience (et optionnellement, du gatorwine) 🍷

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Utilisation

Lancez PowerShell en tant qu'Administrateur, puis :

.\Disable-MicrophonesByRegistry.ps1

Vous verrez quelque chose comme :

[Searching] Looking for microphones...
[Success] Matching microphones found:
[Disabled] Microphone: Logi C270
[Completed] Operation finished. Success: 1, Failed: 0

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Script complet

# SPDX-License-Identifier: AGPL-3.0-or-later
#
# This file is part of the PowerShell script for disabling microphones by regex pattern via registry.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

<#
.SYNOPSIS
    Disables microphones matching a regex pattern via Windows Registry

.DESCRIPTION
    This script identifies audio capture devices matching the specified regex pattern
    and disables them by modifying their DeviceState value in Windows Registry.
    More reliable than PnP methods in managed environments.

.NOTES
    Author: Mat Ice
    Date: October 10, 2025
    License: AGPLv3
#>

# === CONFIGURATION TO MODIFY HERE ===
$regexPattern = "Logi C270"
# =====================================

function Disable-MicrophonesByRegistry {
    param ([string]$Pattern)

    try {
        Write-Host "[Searching] Looking for microphones..." -ForegroundColor Cyan
        $audioDevices = Get-PnpDevice -Class AudioEndpoint -FriendlyName "*Microphone*" -ErrorAction Stop

        $matchingDevices = $audioDevices | Where-Object { $_.FriendlyName -match $Pattern }

        if (-not $matchingDevices) {
            Write-Host "[Error] No microphones found matching '$Pattern'" -ForegroundColor Red
            return
        }

        Write-Host "[Success] Matching microphones found:" -ForegroundColor Green
        $matchingDevices | Format-Table FriendlyName, Status, InstanceId

        $successCount = 0
        $failureCount = 0

        foreach ($device in $matchingDevices) {
            $guidMatch = [regex]::Match($device.InstanceId, '\{[A-Z0-9]{8}-[A-Z0-9]{4}-[A-Z0-9]{4}-[A-Z0-9]{4}-[A-Z0-9]{12}\}')
            if ($guidMatch.Success) {
                $deviceIdGuid = $guidMatch.Value
                $regPath = "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\MMDevices\Audio\Capture\$deviceIdGuid"

                if (Test-Path $regPath) {
                    try {
                        Set-ItemProperty -Path $regPath -Name "DeviceState" -Value 0x10000001 -Type DWord -ErrorAction Stop
                        Write-Host "[Disabled] Microphone: $($device.FriendlyName)" -ForegroundColor Green
                        $successCount++
                    } catch [System.UnauthorizedAccessException] {
                        Write-Host "[Failed] Insufficient permissions to disable: $($device.FriendlyName)" -ForegroundColor Red
                        Write-Warning "Access denied to registry path: $regPath"
                        Write-Warning "Try running PowerShell as Administrator"
                        $failureCount++
                    } catch {
                        Write-Host "[Failed] Could not disable microphone: $($device.FriendlyName)" -ForegroundColor Red
                        Write-Warning "Error: $($_.Exception.Message)"
                        $failureCount++
                    }
                } else {
                    Write-Warning "Registry path not found: $regPath"
                    $failureCount++
                }
            } else {
                Write-Warning "Could not extract GUID for device: $($device.FriendlyName)"
                $failureCount++
            }
        }

        Write-Host "[Completed] Operation finished. Success: $successCount, Failed: $failureCount" -ForegroundColor Cyan
    } catch {
        Write-Error "[Exception] An error occurred: $($_.Exception.Message)"
    }
}

$isAdmin = ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)
if (-not $isAdmin) {
    Write-Warning "This script requires administrator privileges to modify registry settings."
    Write-Warning "Please run PowerShell as Administrator and try again."
}

Write-Host "=== Disabling Microphones via Registry ===" -ForegroundColor Cyan
Write-Host "Search pattern: $regexPattern" -ForegroundColor Cyan
Disable-MicrophonesByRegistry -Pattern $regexPattern