Installing PySide 1.2.4 is quite easy and also has phonon support. Simply copy and paste following lines (line by line) to your terminal:

# sudo apt-get install build-essential git cmake libqt4-dev libphonon-dev python2.7-dev libxml2-dev libxslt1-dev qtmobility-dev libqtwebkit-dev python-pip
# pip install --upgrade wheel
# wget https://pypi.python.org/packages/source/P/PySide/PySide-1.2.4.tar.gz
# tar -xvzf PySide-1.2.4.tar.gz
# cd PySide-1.2.4
# python setup.py bdist_wheel --qmake=/usr/bin/qmake-qt4 --standalone
# pip install dist/PySide-1.2.4-cp27-none-linux-x86_64.whl