Piano Hat, Cannot get yoshimi synth to work

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I reckon the following should get everything installed and working:

## This installs everything.
sudo apt-get install python-dev libasound2-dev swig
git clone https://github.com/vishnubob/python-midi
cd python-midi && sudo python setup.py install
sudo apt-get install yoshimi
curl get.pimoroni.com/i2c | bash
sudo apt-get install python-smbus
git clone https://github.com/pimoroni/cap1xxx.git
cd cap1xxx && sudo python setup.py install
git clone https://github.com/pimoroni/Piano-HAT.git
cd Piano-HAT && sudo python setup.py install

## This gets Yoshimi and the Piano HAT midi example running.
sudo amixer cset numid=3 1
jackd -dalsa -n4 -r44100 -p512 &
yoshimi -K -a &
cd examples
sudo python midi-piano.py