There's an overview of the audio settings which should be used with the Pi's on-board sound in this sticky.
It's probably related to incorrect settings - see 1., once you have the correct audio settings, the message should disappear.
it might be related to 1. Is the audio played directly by your TV or is it routed to the home cinema ?
Any messages logged in /dev/shm/runcommand.log ? Are you using Steamlink over WiFi or wired ? What's the resolution of your display ?
@t3stin I don't know, I use a stock config and this is not set on my system. If you just want to test the sound, there's a command line speaker-test command you can use. Or download an .mp3 and play it from the command line with cvlc.
There is no fps slider or setting, like in every system. You could control the fps with syncing to monitors refresh rate, that would be the way. If 60 Hz is not possible, it jumps down to 30 Hz, which leads to (hopefully stable) 30 fps. There should be a V-Sync option, which does exactly that, but I don't know more about it. And jumping from 60 Hz to 30 Hz and back is never smooth, so its should stay at 30 Hz / Fps. Maybe there is somewhere a setting for it.
So, basically reduce resolution and some other settings. Maybe your pi is over heating and slowing down. And maybe you want overclocking, but only if you have a cooler. For audio, maybe change audio_driver=sdl (default is alsa). I had this issue too and I think this is what I did too to solve this.
You must understand that you've given us fairly little to work with. No specifics on hardware, no logs, no EmulationStation version, no real source for the error, etc. It's kind of why the warning before posting exists: the more info you provide, the more likely you are to get an attempt at an answer.
Let me try something: do you hear audio in everything? Are you using videos? When do you get that error - in an emulator? In EmulationStation?
Either way, in the sound menu from EmulationStation try to change the audio device one by one, restart and see if the error persists.
And yes, I suppose if nobody answered it's likely nobody has had that error.
@mitu Weird, is there someplace to mute the audio inside emulationstation that isn't obvious? The audio tab on the emulator had the mute setting set as "off", the volume setting kept defaulting to zero and it reset to that value and wouldn't allow me to save a value. Obviously, I still have a ton to learn!
it's mixed rom set in the arcade folder. It's not separated into MAME or FBA.
So, you're launching multiple emulators from the arcade directory and they're all without sound? Narrowing down which you're using is still important. Keep in mind, there's something like nine versions of MAME to choose from when using it the way you are and three versions of FBA.