When comparing Spotify vs Quod Libet, the Slant community recommends Quod Libet for most people. In the question“What are the best audio players for UNIX-like systems?” Quod Libet is ranked 9th while Spotify is ranked 32nd. The most important reason people chose Quod Libet is:
Quod Libet gives the user the necessary tools to edit and organize their library from within the app. There is support for tags as well to help you quickly find the music to fit your mood. To help you sort through large libraries, you can use the filters which help filter by genera or other search perimeters.
Specs
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Pros
Pro Huge collection of music and fast access to newly released songs
Spotify has over 20 million songs and arguably the largest collection out of its competitors and usually has the fastest access to new music.
The Spotify desktop client allows local music files to be imported with the option of syncing with a mobile device which largely mitigates the issue of missing artists.
Pro Related artists
Helps to find new authors based on your previous picks
Pro Client's functionality can be extended via third-party apps
Spotify desktop client allows for third-party apps. They extend the functionality of Spotify and many of them offer new ways of discovering music. Noteworthy apps include Moodagent, Last.fm, Swarm.fm, ShareMyPlaylists, The Hype Machine, We Are Hunted, Shuffler.fm.
Pro Curated playlists
Public playlists on Spotify created by other people are great for finding new music.
Pro Has a free version
A free, ad-supported account allows streaming from an extensive library of music.
Pro Weekly Discover playlist uses a great algorithm
A playlist generated by Spotify based on your listening habits and released every Monday. The algorithm used by this playlist is great and stands out from its competitors.
Pro Great for organizing and editing large collections
Quod Libet gives the user the necessary tools to edit and organize their library from within the app. There is support for tags as well to help you quickly find the music to fit your mood. To help you sort through large libraries, you can use the filters which help filter by genera or other search perimeters.
Pro Lots of plugins available
Quod Libet offers many plugins including Last FM sync, lyrics support, and iOS sync.
Pro Powerful search syntax
Quod Libet has powerful search syntax options, which are very useful for creating smartlists or querying a big music collection.
Pro Easy to use
Despite very good library management capability, Quod Libet is easy to use. The base music player doesn't have too many features, making it a breeze to use. However, if you want to go deeper you can install plugins. These plugins can sometimes add complexity, but it's up to you what you do or don't want.
Pro Integrates with IoT / home audio
Sonos, Squeezebox, ...
Pro Built-in Soundcloud support
Pro Folder view
Quod Libet has multiple viewing modes, including Folder (File System) hierarchy view. The only other program to have a good folder view would be Sayonara.
Pro Customizable looks
There are a few controls that allow the user to change how the player looks.
Pro Fast & Small
Fully functional and takes up little space on the hard drive.
Cons
Con Free account have lots of ads
If you hate commercials, you would buy Premium or go on using something else.
Con Discovery is terrible
The discovery algorithm is poor and does not learn fast enough. Not obvious how to train it.
Con Poor audio quality
There's a high range of bitrates and most of vary from average to bad.
Con (not) customizable
If you get a player, you want to make it yours. QL has a lot of stuff preconfigured, which you can't make as you want it. So base is great, but never makes it to be come yours.
Con Doesn't support playlist files
Con The GUI could have more eye-candy
There aren't any icons within the GUI, just text. This makes it feel more like a library management tool than an audio player. A little polish would go a long way here.
Con Rhythmbox clone
Can't find many differences with Rhythmbox.
Con GTK app
It will need a bit more of resources in a non qt environment.
Con Plugins could be better integrated
Lyrics are not downloaded automatically in Quod Libet, while simply viewing lyrics could be made a lot more accessible. There is also little information pulled from last.fm - scrubbing works, as well as there being no artist info or suggestions for similar artists.
Con Uses quite a bit of memory
Quod Libet can use up to 130 MB.