RetroPie v4.8 Audio Fix for GPi CASE

GPi CASE, photographed with my Sony Mavica MVC-FD73.

I recently got my hands on a used GPi CASE from eBay. From time to time, I enjoy playing some of the original Nintendo games, such as Mortal Kombat, Tetris and The Legend of Zelda. It teleports me back to the early days and helps to temporarily wipe my mind as needed.

What I don’t like doing is wasting my time searching through the web for bug/error fixes. And, after flashing RetroPie v4.8 and installing the patches from Retroflag’s website, I got the following errors and could’t get any audio through the speakers.

Note: I found the errors in the ~/.emulationstation/es_log.txt file.

lvl0: VolumeControl::init() - Failed to attach to default card!
lvl0: AudioManager Error - Unable to open SDL audio: ALSA: Couldn't open audio device: No such file or directory

I confirmed from here what the issue was and then modified the /boot/config.txt file on my system. Don’t forget to reboot after you edit/replace the file.

I then got the following error and found a solution from here.

lvl0: VolumeControl::init() - Failed to find mixer elements!

I figured I’d do a good deed and post my modified config.txt and possibly save others from the frustration I experienced with these issues. 😎

You can find the source/gist here.