We don't know any good NoteCable Spotie Music Converter open-source alternatives yet.
You are more than welcome to suggest any alternatives that you know of, or ask the community for suggestions.
Alternatively, we recommend checking out LibHunt for open-source libraries and alternatives to NoteCable Spotie Music Converter.
We've been in a situation where we needed to have all of your Spotify playlists converted to another regular audio format, such as MP3 or M4A, so that they could be played on a device or program that the Spotify app didn't support. A music converter can come in handy if you want to copy Spotify tracks to a USB stick, a DJ software program, or an old iPod shuffle. Notecable Spotie music converter could defitnately take the responsibility. It is useful for easily downloading your favorite Spotify songs, playlists, albums, and podcasts for being able to legally remove DRM using recording technology. Technically speaking, it's fully compatible with both Spotify Free & Premium account and reserve all ID3 tags information after downloading. You can keep lossless output audio quality through this program and freely play downloaded Spotify music offline. Highly recommended!