Same problem. When I did a manual install of Mint 17, I found cmus had defaulted to alsa. I get sound but it's muffled and bad.
There isn't even a volume applet on the bar at the bottom. When I tried "Pulseaudio &" from the command line I got
" Failed to open module mbeq_1197.so: mbeq_1197.so: cannot open shared object file: No such file or directory
E: [pulseaudio] module-ladspa-sink.c: Failed to load LADSPA plugin: file not found
E: [pulseaudio] module.c: Failed to load module "module-ladspa-sink" (argument: "sink_name=ladspa_output.mbeq_1197.mbeq master=alsa_output.pci-0000_00_1b.0.analog-stereo plugin=mbeq_1197 label=mbeq control=2.3,-5.0,-6.7,-9.0,-11.3,-13.0,-13.3,-6.7,-4.0,-1.7,0.3,4.3,11.3,15.7,20.3"): initialization failed.
E: [pulseaudio] main.c: Module load failed.
E: [pulseaudio] main.c: Failed to initialize daemon."
It all worked fine on Mint 16, and a fresh install on my other device works okay, but that was a complete install.