You can use a simple python script to catch GPIO input presses and translate them to volume change commands. Here is an example on how to do that - https://www.raspberrypi.org/forums/viewtopic.php?t=222763.

@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

I've enabled Pulse again for within EmulationStation. It seems to fix my problem so far. I'll keep a close eye on this.

@RpiBeginner said in Sound error in retropie: Its always easy to suggest "Use another sound card".. I was suggesting to change the settings in Emulationstation, not the device...

@mitu Hi! I just wanted to let you know that i have fixed the problem. I bought a Raspberry Pi 3 Model B+ and that seems to fixed the problem. Thanks for testing and helping me out! Greetings Stefan

@RpiBeginner Thank you. English isn't my native language and I wasn't sure if you meant "[A while ago] I tested it with my pc [and there was no hiss], and [now on the Raspberry Pi] the hiss is still there". :) So it may very well be that the usb card is faulty or just not very good.

I had the same problem. The navigation sound work but with delay, i press bottom and the sound play 2 seconds later. The video screen saver is not heard. The volume control although it changes it stays at zero. But the sound in the games is good. I have tried all the options of "Audio Card" "Audio Device", but the only one I hear something is heard with a lot of lag. This happened to me after I had updated the Emulation Station. Before updating it worked fine. Is there any way to fix it?

@swimdad84 it looks like it. You can also plug your phone into that dongle too to test it I suppose or just plug the pi into it.

@ucald4amarine one thing to add. All the sounds on the screensaver worked fine up to I told the arcade to do a random splash screen on startup.

Right I've solved the problem and now have everything working correctly. Many thanks for everybody's help with this. I thought it might be useful for future reference to close with a summary of the issue and how it was resolved. Problem Summary 3.5mm audio output on Rasperry Pi causing hiss and interference from RetroPie sound output. System info Rasperry Pi Model: Raspberry Pi 3 Model B+ Distro: Rasperian 9 (Stretch) RetroPie Version: 4.3 Solution Disabling the on board 3.5mm audio jack and using a USB sound card (https://www.amazon.co.uk/gp/product/B07MNRRT84/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1) to connect the amplifier and speakers. USB sound card installation steps Disable the on board 3.5mm audio jack in /boot/config.txt: Change the line: dtparam=audio=on to: dtparam=audio=off Under Sound Settings within Emulation Station select: Audio Device: Speaker OMX Player Audio Device: Local Note, you may also wish to turn up the system volume however this is down to personal preference. Optional step to enable sound in Splash screen videos Update the script: /opt/retropie/supplementary/splashscreen/asplashscreen.sh change the line: omxplayer -o <option> -b --layer 10000 "$line" to read: omxplayer -o alsa -b --layer 10000 "$line"

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.