This is an update from my previous post about installing Amarok 1.4 on Ubuntu 9.04 (Jaunty Jackalope).

Follow this step:

sudo add-apt-repository ppa:bogdanb/amarok14
sudo apt-get update
sudo apt-get install amarok14

If you have some error messages like:
amarok14: Depends: libmysqlclient15off (>= 5.0.27-1) but it is not installable

download this file, and install
http://security.debian.org/debian-security/pool/updates/main/m/mysql-dfsg-5.0/libmysqlclient15off_5.0.32-7etch12_i386.deb

This will fix the dependencies problem.