Hi all.

I spent some time this morning coming up with a better approximation based on plain observation as there's little documentation here.

I submitted a PR for it, so hopefully this should be improved shortly.

If anyone wants to take a stab at testing it, and is comfortable with compiling code (or using @meleu's script to install test branches) this is my dev branch, based on 2.6.3.

https://github.com/pjft/EmulationStation/tree/OMX-Volume

You may also download a binary for the Pi 3 here:

https://github.com/pjft/EmulationStation/releases/download/0.1-OMX/emulationstation

Place it somewhere on your pi, exit the main ES, run chmod +x emulationstation and then ./emulationstation and see how it performs at the different volume levels, especially compared to VLC.

Would love to hear your impressions. Be mindful that different videos have different volumes, as well as different hardware systems (i.e. emulators), but hopefully this performs better.

Thanks.

@FrustratedUser Advancemame and lr-mame2010 can be installed from the optional packages

I think I have added an option to disable video sounds a while ago. Could you check if it's not in one of the menus? I know options were changed around a while ago, but the should be one such option.

@cif140
I've set this up using the buttons on a logitec s-150 usb sound card+amp+speakers. To the pi, it registers as two devices a sound card, and a HID keyboard.
Anyways, I used triggerhappy (or its deamon: thd) to listen to specific keypresses (it has a mode to just show the presses it detects, so you can find out easily depending on your HW).
This then triggers one of three scripts for volume up, down or mute toggle.
These scripts first perform the alsa command, then play a sound to reflect the current sound volume.

This all starts at system startup, and is completely independent from RetroArch.

I can post the scripts if you're interested, and when I'm back at a proper computer.

It worked! Thank you so much!

Actually I didn't do anything really except on my PC went to look at the network, retropie showed up and without extra software for IP addresses etc, it's let me copy/paste to the rom folders and delete stuff I don't want.

We expecting a bunch of setup but, nope, showed on my network and allowed full access.