@TheAutisticGamer said in Mono Audio for HDMI?:

what i mean is... If I set both left and right to go off with the same sounds. Will it cause problems with reverb? IDK I'm just curious

I don't think so.

EDIT: Just found an intireley different problem that doesnt have to with audio but an emulator. Should I post it here or create a new thread?

If it's not related to the audio configuration for stereo to mono conversion, then please open a separate topic.

Just in case anyone else comes across this I got it working. It wasn't easy and took some trial and error, there isn't very much documentation out there about the inner workings of the asound.conf file but I must have read it all.

The asound.conf file needs to look like this. Obviously if your usb sound card is a different number or you didn't disable the default sound output of the pi yours might be a little differnt bit this should mean you get no errors about mixers and both game sound and background music on ES play ok all through the left channel only.

pcm.custom { type plug slave { pcm "dmix:1,0" } ttable { # Copy both input channels to output channel 0 (Left). 0.0 1 1.0 1 # Send nothing to output channel 1 (Right). 0.1 0 1.1 0 } } ctl.custom { type hw card S2 } pcm.!default pcm.custom ctl.!default ctl.custom

Thank you,
I tried this and I found that the sound gets very choppy in FinalBurnNeo playing Street Fighter III.
Thanks anyway.

You can always bypass software and just splice together a cable that combines the stereo audio channels into one output. Just strip the left and right channel wires, wire the grounds together, solder a 1kΩ resistor to the end of each audio channel and combine them together to get a solid mono output from a stereo source.

0_1519062531787_Screen Shot 2018-02-19 at 12.38.47 PM.jpg

@Laserdisc
Hi

On the Pimoroni forum there have been several people with this type of issue and the fix was to re-solder the existing audio jack socket.

Cheers

Paul