Can't install audio_common (unment dependencies)

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Hello, I'm using ROS Hydro on Ubuntu 12.04 and I'm not being able to install the audio_common stack.

I'll list everything I've tried:

1) sudo apt-get install ros-hydro-audio-common

output:

The following packages have unmet dependencies:
 ros-hydro-audio-common : Depends: ros-hydro-audio-capture but it is not going to be installed
                          Depends: ros-hydro-audio-common-msgs but it is not going to be installed
                          Depends: ros-hydro-audio-play but it is not going to be installed
                          Depends: ros-hydro-sound-play but it is not going to be installed
 ros-hydro-rosbag : Depends: ros-hydro-rosbag-storage but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

2) sudo apt-get -f install ros-hydro-audio-common

same output as shown above

3) I've tried installing only one of the packages by using sudo apt-get install ros-hydro-sound-play

output:

The following packages have unmet dependencies:
 ros-hydro-rosbag : Depends: ros-hydro-rosbag-storage but it is not going to be installed
 ros-hydro-sound-play : Depends: festival but it is not going to be installed
                        Depends: festvox-kallpc16k but it is not going to be installed
                        Depends: gstreamer0.10-plugins-ugly but it is not going to be installed
                        Depends: ros-hydro-audio-common-msgs but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

I'm having the same problem (unment dependencies) when I've tried installing others packages. Does anyone know what is causing this?

EDIT:

4) sudo apt-get install aptitude

output:

The following packages have unmet dependencies:
 aptitude : Depends: libcwidget3 but it is not going to be installed
            Recommends: libparse-debianchangelog-perl but it is not going to be installed
 ros-hydro-rosbag : Depends: ros-hydro-rosbag-storage but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).