Groovy arcade audio questions

[aj8302]

So after a few years of trying to get my TMNT arcade with original CRT to work I finally got it to work with Groovy Arcade and it runs awesome! I only have a few questions is there a way to lower the volume from the software itself and some how my menu were you select mame or any of the other platforms is upside down my kids were button smashing and flipped it. How do I flip it back? Thanks

[psakhis]

With Tab key, under slider options menu you find "Master Volume slider"

[aj8302]

Thank you that did the job on the audio. Any solutions on the main screen being flipped upside down were you select meme or the platform you are using.