A Powershell script to normalize audio in bulk using SoX

NormalizeAudio.ps1

# Loop through each .wav file in the current directory
$inputFiles = Get-ChildItem -Path . -Filter *.wav

$inputFiles | ForEach-Object -Parallel {
    $newFilename = $_.BaseName + ".wav"
    Write-Output ("Processing $newFilename")
    
    $outputFile = Join-Path $_.DirectoryName "converted" $newFilename
    # If the "converted" directory doesn't exists, create it
    if (!(Test-Path "converted")) {
        New-Item -ItemType Directory -Path "converted"
    }

    # interesting effects
    # compand 0.3,1 6:-70,-60,-20 -1 0 0.2
    & sox --norm=+8 $_.FullName $outputFile pitch -80 bass +8
}