Add set-volume.ps1

Scripts/set-volume.ps1

@@ -0,0 +1,37 @@
+<#
+.SYNOPSIS
+	Sets the volume 
+.DESCRIPTION
+	This PowerShell script sets the audio volume in percent.
+.PARAMETER volume
+	Specifies the percent number
+.EXAMPLE
+	PS> ./set-volume 50
+.LINK
+	https://github.com/fleschutz/PowerShell
+.NOTES
+	Author: Markus Fleschutz | License: CC0
+#>
+
+Param([Parameter(Mandatory=$true)] [ValidateRange(0,100)] [Int] $Volume)
+
+try {
+	# Create the Windows Shell object. 
+	$obj = New-Object -ComObject WScript.Shell
+    
+	# First, set volume to zero. 
+	1..50 | ForEach-Object {  $obj.SendKeys( [char] 174 )  }
+    
+	# Calculate number of (volume up) key presses 
+	$keyPresses = [Math]::Ceiling( $Volume / 2 )
+    
+	# Raise volume to specified level. 
+	for( $i = 0; $i -lt $keyPresses; $i++ ) {
+		$obj.SendKeys( [char] 175 )
+	}
+	& "$PSScriptRoot/give-reply.ps1" "$($Volume)% volume."
+	exit 0 # success
+} catch {
+	"⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
+	exit 1
+}