The NES does not do stereo and never will. Those "stereo" mods do nothing more than separate the 5 sound channels (pulse wave 1, pulse wave 2, triangle wave, noise, and samples) and mix mono back in to give it a little more thump. CPU pin 1 is Pulse wave 1 and 2 and CPU pin 2 is Triangle wave, noise, and samples. Pretty much Pulse wave 1 and 2 sounds come out one speaker and triangle wave, noise, and samples come out the other. It is not separating the audio into right and left channels. Here is a link that explains the sounds a bit better http://www.youtube.com/watch?v=la3coK5pq5w. The audio on the NES RGB kit is simply a rebuilt mono circuit (and one that sounds quite good I might add).lettuce wrote:I need to clarify what the 3 audio solder pads are for on the NESRGB, Audio Output, Audio Input A (CPU Pin 1) and Audio Input B (CPU Pin 2.). I am want to run left and right audio (is the NESRGB even stereo?) to the 2 pins on my mini din socket (pins 1 and 2), which points on the NESRGB do i need to wire up and what are all 3 solder pads for exactly?
CPU Pin 1 goes to pad A on the kit
CPU Pin 2 goes to pad B on the kit
Pad O goes to your A/V port.
To connect expanded audio follow these steps. You will need to click on the images to get them full sized to see it properly, I threw it together in five minutes and don't feel like properly sizing this crap.
1. Connect the two points shown below in your Famicom to NES adapter.
2. Connect pin 9 to a resistor and run it to the point shown in the picture below. It is not pin 40 as stated before, they had it backwards as pin 40 is right above pin 9 (you can even see the numbering since I removed the socket in mine).
NOTE: I used a 22k Ohm resistor as anything higher made expanded audio on the Everdrive N8 too quiet.
You can also connect expanded audio with the two 1.2k resistors (and connecting it directly to audio out instead of directly to the kit) as shown earlier in the thread however this does not eliminate the buzzing like said previously, all this manages to do is make expanded audio too quiet when using the everdrive since its not being amplified. Once I turned up the stereo receiver to a level I liked the buzzing was still there with the dual 1.2k Ohm non amplified setup so I personally prefer the method shown here.
And a close up of where pin 9 needs to go.
I also don't mean to sound like a dick but Tim has how to hookup audio (without expanded audio) right on the NES RGB page. Everyone should really take a look at this and read through this entire thread before doing this mod if they have questions about it as all this stuff was answered before already.
http://etim.net.au/nesrgb/NESRGB-Pinout.pdf
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