Earcandy is a PulseAudio volume manager, which for me is probably the first thing that i ever liked about pulse audio. This volume manager could mute music in your amarok or rhythombox or literally any music player when you play some video in youtube(i am not lying) or VLC or other video players. Mute is not the right word, but instead the music slowly fades away, and the sound from video player fades in. Sounds promising eh? But it is much better than you think.