Sound output stereo / mono
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I know some old arcades had mono speakers and twin mono speakers as well that doesnt mean the sound is mono. It just the way it was wired up.
I know old arcade jamma boards would require in line adapter (probably 2 10k resistors) to bring the levels down to something reasonable if you wanted to go through an amp since the jamma boards are ready to plug into a speaker already. Im not sure what amp your using but I would guess the pi wont be outputting anything that would damage an amp. The only reason you would want there resistors is if you get clipping. Again it would all come down to the amp in use
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All I know is Bally midway titles play some sound effects from the left speaker and some from the right, together you get all the games sounds. I own an original Tron cabinet and verified this.
A good game to test is Tapper. The first level plays "oh susanna". So having only the right speaker hooked up it plays a choppy half sound of this tune, missing every other beat or so.
Is there any way to combine these in software before sending them out to left or right? So one speaker would play the full sound?
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Well Yes I can show you how to do this. All you need to do is tell the mame mixer not to use stereo but this will make all games mono.
change this to
is_stereo = 0;use the previous compile guide i have you and you should be good to go
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Could that be set to toggle option within mame2003-plus menu? Could be pretty useful, the default being stereo. Maybe a "general" and "this game" option ?
Use stereo.........y/n
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To be honest most people would bridge there 3.5mm jack. You could post an issue on the libretto github about it and ask them to add it. It would really be up to the maintainers at the end of the day though cant hurt to ask
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Ok I'll post there
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Found a simple way to do this at the amplifier:
https://www.google.com/amp/s/www.wikihow.com/Bridge-an-Amplifier%3famp=1
Tested and works :)
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@mahoneyt944 it usually easier to do it at hardware level to be honest. It also is dependent on what amp you are using how you go about it. Not all amps can be bridged though most home stereo amps cant do this but you can couple the input to both channels for them anyway.
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I don't really understand it fully but with my specific amp. It works. and that's enough for me. Thank you for the support.
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glad you got it sorted all roads lead to rome the easiest solution always works best!
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