Instead of searching for an illegal serial key, download the of AVS Audio Converter or use a trusted free alternative like Audacity . If you need batch conversion and a polished interface regularly, consider purchasing a license – it supports the developers and ensures your system stays safe and legal.
Extracts audio tracks directly from video files (AVI, MPEG, WMV, MP4) and converts them to MP3 or other formats.
to AVS Audio Converter that you can use instead.