At the moment  i try to install amarok after using songbird at Ubuntu Jaunty for playing my mp3 collections. But the problem came out, Amarok gives the error "Too many errors" and does not play the file. This short way that can resolve the problem and work for me.

First you can use this way:

sudo apt-get install libxine1-ffmpeg

Or if still can't work use this one.

*. Kill pulseaudio daemon
*. Edit file /etc/pulse/client.conf change

autospawn = yes

become

autospawn = no

*. Start the pulseaudio daemon
Reopen Amarok and try play the file again.