# Load required assemblies
[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Speech")

# Set Volume
Function Set-Speaker($Volume){$wshShell = new-object -com wscript.shell;1..50 | % {$wshShell.SendKeys([char]174)};1..$Volume | % {$wshShell.SendKeys([char]175)}}
Set-Speaker -Volume 50
[audio]::Mute = $false