How to set up a PiTop CEED to run RetroPie using the PiTop speakers

RetroPie with PiTop speakers

RetroPie on PiTop with PiTop speaker (tested on CEED)
 
Connect a keyboard
Connect a game pad
Fresh boot from V4.1
Configure the game pad
 
Enable and connect WiFi in the RetroPie menu
Under the RetroPie Audio settings, force to HDMI and adjust the MIXER volume to max
 
Press F4 to go to the console
 
sudo raspi-config
#enable I2C in Advance Options
 
wget http://apt.pi-top.com/add
chmod +x ./add
sudo ./add
sudo apt-get update
sudo apt-get install -y pt-speaker
#ignore errors when installing pt-speaker
 
sudo nano /etc/rc.local
# add the following 3 lines just before exit 0 to enable the speaker for mono, left or right
python /opt/pt-speaker/pt-speaker-controller.py m
python /opt/pt-speaker/pt-speaker-controller.py l
python /opt/pt-speaker/pt-speaker-controller.py r
 
sudo nano /boot/config.txt
#uncomment
hdmi_drive=2
 
sudo reboot

I think this does not work properly anymore with the latest software from pi-top. For new instructions, see https://github.com/rricharz/Retropie-pi-top

Feedback is appreciated.