Hi I get the same problem as the prior dude
when trying to launch executable mocp
FATAL_ERROR: No valid sound driver

answer to that problem was to add alsa dev files.
I use ubuntu and I only find this package with apt-get:

libasound2-dev - ALSA library development files

after installing this i still have no ALSA :(

I get this when doing ./configure

MOC will be compiled with:
Decoder plugins:
OSS: yes
ALSA: no
JACK: no
DEBUG: yes
RCC:
Network streams: no
Resampling: no

Well its obvious that i have no alsa support
How come the configure script choose OSS over ALSA per default ? ALSA is the future for linux, why not disable OSS or at least make it optional.