When comparing yarock vs Mellow Player, the Slant community recommends yarock for most people. In the question“What are the best audio players for UNIX-like systems?” yarock is ranked 14th while Mellow Player is ranked 31st. The most important reason people chose yarock is:
Yarock's database supports multiple music collections, which can be switched between easily.
Specs
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Pros
Pro Easy to switch between different collections
Yarock's database supports multiple music collections, which can be switched between easily.
Pro Does not meddle with your tunes
If you have spent your precious time crafting your music collection the way you like it and don't want any 'jumped up alarm clocks' renaming and altering your tags, Yarock is a good choice for you.
Pro Multiple views
Yarock offers multiple views when browsing one's music collection, including artist, album, or track.
Pro Native
It is written in Qt so it requires less resources than a web browser or an electron application.
Pro AppImage
It is available as AppImage so you can easily try it.
Cons
Con Doesn't support playlist files
Con No working packages
Almost impossible to get it to install and work.
Con No ability for mass tag correction
In yarock, album covers can't be added to the files, meaning there's a lack of music fingerprint technology.
Con Lacks music fingerprinting ability
This application does not have any music fingerprinting abilities such as musicbrainz, which limits the apps usefulness.
Con UI may be confusing
First-time users may find the UI un-intuitive.
Con QML
It written in Qt-QML which ignores all Human Interface Guidelines and make the app look like a web page.
Con Not native
It's using qt5-webengine which is not much different from electron / a webbrowser.