First post, by Whirlinurd
Using Dosbox under Retropie for gaming for some time now. I found some tutorials that I could install Munt under Retropie. This was a tutorial originally for Raspberry pi 2 and also one for the Raspberry pi 3 with some build modifications also for a Raspberry pi 3 or 4. I combined the two tutorials tweaking some packages and using Munt 2.4.0 instead of 2.2.0. This worked perfectly now having Roland Midi output under dos.
The only thing is I use the 3.5mm jack for audio. This works fine for all other audio outputs that Retropie uses. When I finished installing Munt audio it is coming out of the HDMI output. The only way I have found until now is by disabling all HDMI audio and forcing all to the audio jack. I have discussed this in the Retropie forum and they think this is not the solution to my problem.
Until now we haven't found anything that works.
This is the tutorial I have used to install Munt:
After discussing a lot the last thing we tried is changing Step 11 in the tutorial that says '/usr/local/bin/mt32d -i 12&' in '/etc/rc.local' that seems to start Munt with the system to the following:
./mt32d -i 12 -d dmix:CARD=Headphones,DEV=0
I have tried searching around to find anything to fix this but most people use Munt under Windows or with a Retropie setup just leave all audio to HDMI.
I would like to know how it is possible to change the default HDMI output that Munt uses to change this to a Raspberry pi 3.5mm audio output?