@clkgames Unfortunately it's a hardware limitation, if you remember that Rpi was originally created for automation; not for retroemulation; so it's totally understandable that there are some limitations to retroemulation.
@Zing thank you so much for your time and help. I've ended up going for a new install again. I cannot say for sure what caused the issue, however after a clean install everything went back to normal.
I've found a fix, in case someone needs a help with this issue as well.
Load a game, then press Select +B to bring up the Retroarch menu.
From there, press A and go to Configurations > Audio.
Now set the audio volume and mixer volume to -10.
