Aktion (REST-Request) auslösen bei (Un)Mute der Lautstäke

<#
   Register audio mute events
#>

# function to load nuget assembly
function Load-NugetAssembly {
    [CmdletBinding()]
    param(
        [string]$url,
        [string]$name,
        [string]$zipinternalpath,
        [switch]$downloadonly
    )
    # Accept all TLS protocols
    [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]::GetNames([System.Net.SecurityProtocolType]) 
    if($psscriptroot -ne ''){  
        $localpath = join-path $psscriptroot $name
    }else{
        $localpath = join-path $env:TEMP $name
    }
    $tmp = "$env:TEMP\$([IO.Path]::GetRandomFileName())"  
    $zip = $null
    try{
        if(!(Test-Path $localpath)){
            Add-Type -A System.IO.Compression.FileSystem
            write-host "Downloading and extracting required library '$name' ... " -F Green -NoNewline  
            (New-Object System.Net.WebClient).DownloadFile($url, $tmp)
            $zip = [System.IO.Compression.ZipFile]::OpenRead($tmp)
            $zip.Entries | ?{$_.Fullname -eq $zipinternalpath} | %{
                [System.IO.Compression.ZipFileExtensions]::ExtractToFile($_,$localpath)
            }
	Unblock-File -Path $localpath
            write-host "OK" -F Green  
        }
        if(!$downloadonly.IsPresent){
            Add-Type -Path $localpath -EA Stop
        }
        
    }catch{
        throw "Error: $($_.Exception.Message)"  
    }finally{
        if ($zip){$zip.Dispose()}
        if(Test-Path $tmp){del $tmp -Force}
    }  
}

# load required assembly from nuget
Load-NugetAssembly 'https://www.nuget.org/api/v2/package/NAudio/1.10.0' -name 'naudio.dll' -zipinternalpath 'lib/net35/naudio.dll' -EA Stop  


# Get IMM DeviceEnumerator object
$deviceenum = New-Object NAudio.CoreAudioApi.MMDeviceEnumerator
# Get system default audio endpoint
$dev = $deviceenum.GetDefaultAudioEndpoint([NAudio.CoreAudioApi.DataFlow]::Render,[NAudio.CoreAudioApi.Role]::Multimedia)
# forcefully unregister event subscriber
Unregister-Event -SourceIdentifier VolumeChanged -Force -EA SilentlyContinue
# mute state variable to register change
$global:muted = $dev.AudioEndpointVolume.Mute
# register audio change event
Register-ObjectEvent $dev.AudioEndpointVolume OnVolumeNotification -SourceIdentifier VolumeChanged -Action {
    if (!$global:muted -and $event.SourceArgs.Muted){
        write-host "Device muted." -F Green  
        # here place your rest method e.g.
        # Invoke-RestMethod 'http://192.168.xxx.xxx/relay/0?turn=off'  
        $global:muted = $true
    }elseif(!$event.SourceArgs.Muted -and $global:muted){
        write-host "Device unmuted." -F Green  
        # here place your rest method e.g.
        # Invoke-RestMethod 'http://192.168.xxx.xxx/relay/0?turn=on'  
        $global:muted = $false
    }
} | out-null

cls
write-host "Waiting for audio mute events ..." -F Green  
while($true){
    sleep .5
}