WMA in MP3: So rettest du eine alte Windows Media-Bibliothek

Tracks bought from the old Windows Media stores are wrapped in DRM whose licence servers were switched off years ago. No converter can open them, and any site claiming otherwise is selling something else. Play one file first: if Windows asks for a licence and fails, that album has to come from the CD or be re-bought.

WMA is already lossy, so converting to MP3 is a second generation of loss. In practice this matters far less than people fear — the music is going to a phone, a car or a kitchen speaker.

Encode at 192 kbps or above and the artefacts are inaudible in those environments. Going to 320 kbps roughly doubles the file size for a difference you will not hear from a WMA source.

Convert album by album rather than pointing a tool at 4,000 files at once. It keeps the folder structure intact, makes it obvious which album failed if one does, and lets you spot-check tags and artwork early instead of discovering a problem after a full day of encoding.

A music library is thousands of files and many gigabytes. Uploading it to a conversion site is slow, hands over a detailed map of your taste and history, and puts your files on hardware you do not control. Morphio runs the encoder inside the browser, so the transfer is disk to disk.