Clarification on Hyper64 Sound over Jamma

[Rob-R]

It has been a LONG time since I broke out my Hyper64 systems... I wanted to show them to my son and... Of course, no sound. I read as many posts on here as I could find, and the general consensus is you don't get sound over Jamma (without the mod).

I'm pretty sure I have a Rev 1 board (B1, FF:WA, and SS64 all work) with the two molex connectors and black volume knob. I'm hooking it up to a Neo Geo JP Candy machine (and a mini, same in both).

The interesting thing is... I do get sound, but it's INCREDIBLY low volume. The black knob (and the random blue pot next to the Jamma connector) do nothing.

Any ideas why this is? Am I misunderstanding and there's something I can/should do to get sound over Jamma without the mod?

 

[Heinz]

Try this thread
http://www.neo-geo.com/forums/showthread.php?81572-Hyper-Neo-Geo-64-System-Board-Revision-1-Manual-info

Looks like the Revision 1's speaker output is via the amp connector.

I had a Rev 2 board and it made life very easy for connecting to the jamma standard. It doesn't surprise me you get some sound though as the jamma pinout for the rev 1 does list mono output. Best bet is to do the modification or wire correctly to the amp connector.

 

[Neo Alec]

I have the rev 1, and wired the auxiliary stereo audio connector on the side of the unit with stereo RCA jacks. I added the jacks to the cable it comes with.