@rogerdodger Welcome to Retropieforum :-) and welcome to the world of RPi audio annoyances :-/ For USB-Audio Devices with 3.5mm jack almost any (c-media compatible) will work. Any I did test had a better S/N than the on-board 3.5mm jack, e.g.: ID 0d8c:000c C-Media Electronics, Inc. Audio Adapter ID 040d:340a VIA Technologies, Inc. ID 1b3f:2008 Generalplus Technology Inc. From another project (no Arcade) I know that the HiFiBerry DAC+ standard provides even better sound. I had very good experiences (read: precise, noiseless audio) in both projects with Sure Electronics amps. You can build a dedicated, external volume knob by using a dual potentiometer (50k Ohm, logarithmic) in between the Rpi out and the amp in. Some troubleshooting hints: I assume -without knowing the real schematic- the 5v from Pi and the 12v/18v/24v from the amp share the same ground. Have you tried feeding them with two separate supplies - one for the pi and one for the amp? Are you using LED stripes in the arcade or nearby to the arcade? They may induce audio noise if they switch a a high rate (impossible to perceive with the human eye - LED stripe makers may use this trick (POV) to save energy and to prolong the LED lifetime). If you use LED stripes inside the arcade and drive them via PWM, this may also induce noise. Some possible solutions are sketched here or here. Last but not least, double insulating audio wires may have some benefits. HTH

Thanks for helping out mate, appreciated! Will have a go with this in a few days and let you know. Cheers.

@Ashrill just be aware save states will not function when using omx as the audio plugin. Also the default volume is insanely loud and can't be adjusted as far as I know.

@mitu Thanks! Hopefully maybe one day they implement something

Hi evryone and thanks for all the hard work, I had the audio bug too (sound was really garbled) until I (apt) install libsdl2-ttf-dev and modify my RetroPie-Setup/scriptmodules/emulators/amiberry.sh to go with SDL2 and update from source.

Solved: The reason was because somehow "Warp Mode" under Speed settings got activated. After disabling it, the sound came back.

Try adding the following parameters in the /boot/config.txt file disable_audio_dither=1 audio_pwm_mode=2 then reboot and see if it makes a difference.

Ok I've tested jslisten but only accept 4 button pressed at once and seems no button sequence working...

please ignore/delete this thread (sorry) it seems I've worked it all out using SGM-V2.01.sf2 and i'm cool with that. Apologies for wasting anyones time.

@grant2258 Yes, I just wanted to report that after some testing yesterday. You were faster than me. ;) I can confirm that most of my samples work in mame2003 binary and mame2003-plus, but not in mame2003 from source; with few exceptions like Blockade that works in all of them. Since there already is a pull request for this, I consider this topic as solved. Thanks for the help! (edit: as well as @markwkidd for the fix and @Headrush69 for testing.)

@logan71f100 Thanks for sharing the workaround.

Thank you, setting it to SDL worked. I never would have thought to try that. I think that they modified something in Advmame as it was working prior to one of the updates with 3.x then just nothing and still worked with 1.4 with Alsa.

Whoever could solve the problem with sound on SNES emulator PI3B, PI3B+ The solutions described "https://retropie.org.uk/docs/Sound-Issues/" do not work. Very disappointed in Raspberry. Sound sometimes slows down and collapses. a few days later .... after reading a lot of unnecessary information The problem was in throttling. avoid_warnings=2 means don't show the warning squares and don't disable turbo mode on under-voltage condition. We still throttle on over-temperature.

@shirion have you tested multiple games? Are they all having this issue? Which region ROMs are you using?