# For ZC Files:
$AcFiles = Get-ChildItem ".\*.*" -Recurse | Where-Object{$_.Extension -match '\.(?:zc|\d{2}#)'}
$found_sns = @()
""
foreach ($acf in $ACFiles){
   Write-Progress -PercentComplete ($AcFiles.IndexOf($acf) / ($AcFiles.Count - 1) * 100) -Activity "Scanning for unique serial numbers in files..." -Status "Processing item $($AcFiles.IndexOf($acf)) of $($AcFiles.Count - 1)"
   $acf_sn = Select-String -Path $acf -Pattern '(?:Serial:|SN\s*)(\d{4,})' | % {$_.matches.groups[1].value}
   if ($found_sns.Count -eq 0 -OR -NOT $found_sns.Contains($acf_sn) -AND $acf_sn.Length -gt 0){
      $found_sns += $acf_sn
	  $found_sns.Count.ToString() + ': ' + $acf_sn
   }
}
"Done. Found " + $found_sns.Count.ToString() + " total SNs (see above).
"



# For SM3 or SM4 WAV Files:
$AcFiles = Get-ChildItem ".\*.wav" -Recurse
$found_sns = @()
""
foreach ($acf in $ACFiles){
   Write-Progress -PercentComplete ($AcFiles.IndexOf($acf) / ($AcFiles.Count - 1) * 100) -Activity "Scanning for unique serial numbers in files..." -Status "Processing item $($AcFiles.IndexOf($acf)) of $($AcFiles.Count - 1)"
   $acf_sn = Select-String -Path $acf -Pattern '((?:S\dU|SM\d)\d{4,})' | % {$_.matches.groups[1].value}
   if ($found_sns.Count -eq 0 -OR -NOT $found_sns.Contains($acf_sn) -AND $acf_sn.Length -gt 0){
      $found_sns += $acf_sn
	  $found_sns.Count.ToString() + ': ' + $acf_sn
   }
}
"Done. Found " + $found_sns.Count.ToString() + " total SNs (see above).
"