When comparing cmus vs DeaDBeeF, the Slant community recommends DeaDBeeF for most people. In the question“What are the best audio players for UNIX-like systems?” DeaDBeeF is ranked 2nd while cmus is ranked 5th. The most important reason people chose DeaDBeeF is:
DeadBeef has a lot of different plugins users can use to customize the interface, controls, and options.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro CLI only
CLI makes Cmus clean, fast and minimalist.
Pro Does not use a lot of memory
Cmus only uses about 15 MB. This is a very small and light media player, which is ideal for people with low end hardware.
Pro Good library structure
A lot of music players may act more like playlist viewers rather than a music library. cmus sorts by Artist > Year > Album.
Pro Works very well with tags from MusicBrainz database
cmus will factor in additional data from the MusicBrainz database while sorting. For example sort orders for arist or album, and the original release date for an album (in the case of a re-release).
Pro Fast
A lot of music players will be slow when starting if they have huge libraries, but CMus starts fast no matter the library size.
Pro Customizable keybindings for a personal experience
You can add keybindings for just about anything - including seeking (forward/backwards 1 minute, for example) which isn't supported by all music players.
Pro No mouse required
cmus does not require a mouse as it runs in the terminal
Pro Open source extensions and scripts
On GitHub you can find the official WIKI where there are a dozen extensions and scripts from color themes to a lyrics viewer and the ability to play YouTube songs.
Pro A lot of plugins
DeadBeef has a lot of different plugins users can use to customize the interface, controls, and options.
Pro Lightweight
DeadBeef uses few system resources, making it great for low end systems and for those requiring a media player that uses as few resources as possible.
Pro Extremely customizable
DeaDBeef has support for title formatting scripting, like foobar2000, which allows you to customize group patterns, the converter output, the window titles, etc. to your needs. DeaDBeeF also has a Design Mode, which allows you to add new widgets to the interface and move/delete existing ones.
Pro Uses GTK2 or GTK3
Users are able to choose a GTK2 or GTK3 build of the application to use within DeaDBeeF.
Pro ALSA plugin allows bit-perfect pipeline to DAC
Pro Supports single-album CUE files
Pro Smooth and easy
Pro Offers a ReplayGain scanner out-of-the-box
Cons
Con No album art
cmus does not display album art
Con CLI only
No graphical interface is available for cmus. Everything is done through CLI (command line interface).
Con Difficult to use
Cmus uses odd keyboard shortcuts such as "C" to pause, "E" to add songs to queue, and "4" to edit the queue.
Con Can't play wavepack files
Con shuffle mode doesn't play an entire huge playlist (over 25 days)
Con GTK-App
So there is basically no integration into non-GTK desktops.
Con Terrible GUI
stop reinventing (ugly) guis. play music and get out of my way.
Con Fails when opening a CUE file
Doesn't work even after 30 minutes of tweaking. Not as good as Audacious.
Con Ubuntu's sound menu buttons don't work
DeaDBeeF shows up in the sound menu; however, clicking the next/previous buttons doesn't do anything.
Con Not as many options as other players
When it comes to options DeaDBeef may not have as many as other more prominent music playing applications.
Con Clunky
I've seen people showing lyrics - but I can't figure out how to make that work.
It's very difficult to use the 'design' function (unlike Guayadeque) to re-arrange and design the interface beyond something like a music list and artwork...