CopyTTSVoices.ps1

#Requires -RunAsAdministrator

# copy OneCore (mobile) voices into desktop voices so that they can be used via SAPI
# mobile voices should only be converted if a desktop voice of the same friendly name does not exist

$ErrorActionPreference = 'Stop'
Set-StrictMode -Version 2

$VoicesPath       = 'HKLM:\SOFTWARE\Microsoft\Speech_OneCore\Voices\Tokens'     # where the OneCore voices live
$destinationPath  = 'HKLM:\SOFTWARE\Microsoft\Speech\Voices\Tokens'             # for 64-bit apps
$destinationPath2 = 'HKLM:\SOFTWARE\WOW6432Node\Microsoft\SPEECH\Voices\Tokens' # for 32-bit apps

$64BitDesktopVoices = @{}
$DesktopVoices = Get-ChildItem $destinationPath
ForEach($DesktopVoice In $DesktopVoices) {
    $Name = $DesktopVoice.Name
    If($DesktopVoice.Name -Match "\\TTS_MS_[A-Z]{2}-[A-Z]{2}_([A-Z]+)_\d{2}\.\d$") {
        $VoiceFriendlyName = $Matches[1]
        $64BitDesktopVoices.Add($VoiceFriendlyName, "")
    } ElseIf($DesktopVoice.Name -Match "\\MSTTS_V\d+_[a-zA-z]{4}_([a-zA-Z]+)M$") {
        $VoiceFriendlyName = $Matches[1]
        Write-Warning "Ignoring converted mobile voice $VoiceFriendlyName..."
    }
    Else {
        Throw "Unknown desktop voice naming scheme, aborting."
    }
}

$Voices = Get-ChildItem $VoicesPath
ForEach($Voice in $Voices) {
    If($Voice.Name -Match "\\MSTTS_V\d+_[a-zA-z]{4}_([a-zA-Z]+)M$") {
        $VoiceFriendlyName = $Matches[1]
        If(-Not($64BitDesktopVoices.ContainsKey($VoiceFriendlyName))) {
            $NewKey = Join-Path -Path destinationPath -ChildPath $Voice.Name
            If(-Not(Test-Path $NewKey)) {
                Write-Output "Copying voice $VoiceFriendlyName to 64 bit key..."
                Copy-Item -Path $Voice.PSPath -Destination $destinationPath  -Recurse
            }

            $NewKey2 = Join-Path -Path destinationPath2 -ChildPath $Voice.Name
            If(-Not(Test-Path $NewKey2)) {
                Write-Output "Copying voice $VoiceFriendlyName to 32 bit key..."
                Copy-Item -Path $Voice.PSPath -Destination $destinationPath2 -Recurse
            }
        }
        Else {
            Write-Warning "Ignoring voice $VoiceFriendlyName as desktop voice of the same name already exists."
        }
    }
    Else {
        Throw "Unknown OneCore voice naming scheme, aborting."
    }
}