The most reliable way to get a working ARL is to use your own account (including the Deezer Free Trial ):
Securing a token is the "secret sauce" to turning a simple downloader into a high-fidelity powerhouse. By using your own session cookie, you ensure the highest audio quality and the most stable experience for your music collection.
A verified premium token is the only reliable way to access Hi-Fi Lossless content. Without it, Deemix often defaults to low-quality previews or fails to download entirely. Library Management:
This indicates that the ARL must come from a Deezer account with an active or Deezer Hi-Fi subscription. Only then can Deemix request 320kbps MP3 or FLAC files.