GPIO Audio Module-Retropie-Audio configuration tutorial

If your Module is GPIO18
Download audremap18.dtbo to your pi
sudo cp audremap18.dtbo /boot/overlays/
sudo nano /boot/config.txt
Add this code
dtoverlay=audremap18,pins_18_19

If your Module is GPIO19
Download audremap19.dtbo to your pi
sudo cp audremap19.dtbo /boot/overlays/
sudo nano /boot/config.txt

Add this code

dtoverlay=audremap19,pins_18_19

If your Module is GPIO18&GPIO19
sudo nano /boot/config.txt
Add this code
dtoverlay=audremap,pins_18_19


After rebooting , You need enable local audio

sudo raspi-config  Select System Options -> Audio -> 'headphone'

Go to retropie menu


Select  ->  AUDIO  ->  HEADPHONE

Then reboot again use sudo reboot 

Set audio voice max

Press key START enter retropie MAIN MENU


select SOUND SETTING
->SYSTEM VOLUME 100
->AUDI0 DEVICE   ->  HEADPHONE

->OMX PLAYER AUDIO DEVICE   -> LOCAL

Go back press key B
Then enter SOUND SETTING ->SYSTEM VOLUME again
You will see it is 97 or 77,You need set it 100 again|
After all setting, the VOLUME will became ok

Price: $9.89
Part Number: GPIO Audio Module
Brand: Spotpear
SKU: 0108326