Beginner here. How to get sound with Commodore emulators

[AOR]

Sorry if this is in the wrong place and if this is a dumb question. I am setting up Lunchbox in Windows version 13.25

First I added Mames and everything is working good including sound. I then added Commodore 64 and I thought sound was working. I then Added Amiga then Amiga CD32

I am only able to get sound output when using Mames. I am using Retroarch and UAE with Libretro, The Libretro suggested in a YouTube video by Retro Python - Unbroken Software specifically for the CD32 Console. I am not sure what I am missing. I am sure it's a simple setting. Thank you.

 

 

[AOR]

I figured it out. Apparently the sound issue was related to Retroarch. There is a function that if F9 is pressed audio can be muted or unmuted. This setting does not reset after rebooting the PC. After pressing F9 again the audio is now working.