@RpiBeginner please complete more information as detailed in the link below. Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first

@shoebox low voltage can cause big problems, underclocking is one of them. I would skip the canakit power supply as they are one of the less reliable and go straight to the official raspberry pi power supply.

I figured it out. In the Retropie menu, I had to go into Audio options and change the audio output from 3.5mm Stereo to HDMI because I went from using a PC monitor with the 3.5mm out to full HDMI A/V on my TV. Now FBA and everything else plays smooth and sounds fine.

You are a genius my friend! That fixed it right up, definitely helps with my OCD, hahaha! Wonder why that happens... Thanks again!