Can't convert CD to MP3 with Free Audio Converter Anna Malter December 10, 2018 10:39 Updated Follow To convert audio CD to MP3 you need to use a different program - Free Audio CD to MP3 Converter. Download and install the app from our website. Related articles Dieser Schlüssel wurde bereits in einer anderen Anwendung verwendet. 'Key is already in use within another app' Installation Problem, Microsoft .Net 4.0 Key Invalid error & Key didn't arrive issue: fixed! 100003 Fehler Comments 0 comments Article is closed for comments.