how to wire sound for supergun????

[oceancube]

hey all, well i have a supergun that im building, finished it all up, now i need to know how do i get rca coming out of the jamma harness.. i want to be able to hear the games on my television not a small speaker,, pls lmk and thanks all!!!! have a speaker connected to the jamma through the 2 wires from jamma connector, run and gun audio sounds great, but when i plug up mortal kombat i get no sound!!! thats my big problem.. do i need an amp or what???any info greatly appriciatedQ

[TravistyOJ]

bump

I am wondering how to do this too

[CheffoJeffo]

Not having built a supergun, I don't have firsthand experience, but since JAMMA standard is amplified audio, I wouldn't think that you would want to plug directly into some that expects unamped audio.

Cheers.

[stratjakt]

I believe you're asking two questions ?

Firstly, you can't hear Mortal Kombat through the speakers.  IIRC, Mortal Kombat requires an external amplifier.  Mortal Kombat probably could be lined to your TV to get sound, or an external amp.


Secondly, adding RCA jacks..  Most games have amplified audio, and you need line level out to your TV. 

Have a look here:

http://www.tkk.fi/Misc/Electronics/circuits/speaker_to_line.html

Replace the 1K resistor in the schematic with a 1k pot so you can adjust to line level with each individual game, and you might want a bypass switch on the 10k resistor for games like Mortal Kombat, or old Nintendos, etc, that already send out line level, or to cut audio completely.

Also, if you have a Neo Geo board, then know that the pins on the Jamma board labelled Audio Out and Audio Ground are to the Neo Geo Audio Left and Audio Right, and you need your own ground.  If you wire them both up they'll cancel each other out and you wont hear "center channel" audio.