I need to sort something out here. I am wanting to get the Famicom Expanded audio on my Front Loading US-NTSC NES Console which has Tim Worthington's RGBNES PCM mod fitted, i will be using a Everdrive N8 NES version cart on this system also.
Now this NESRGB mod not only adds RGB video to the NES system it also has a rather good rebuilt mono audio circuit (which is better than the original NES audio circuit). To be able to use this NESRGB audio you have to connect CPU pins 1 & 2 from the NES PCB itself to the 2 channel inputs on the NESRGB PCB labeled Channel A & B, as pictured below.....

Because of this rebuilt audio circuit, it has been suggested that rather than using a 44k resistor to bridge pins 3&9 on the Expansion socket of the NES, instead run a wire (with a 22K resistor attached) from pin 9 of the Expansion socket to the 2 resistors on the NESRGB PCB as pictured below....

But what was also used in the above mod, was the mod to the Famicom2NES adapter which bridges 2 pins....

I dont have this Famicom2 NES adapter as im using the Everdrive N8 NES version (not famicom), i have tried the mod (pin 9 to 2 resistors on the NESRGB pcb) along with the Famicom version of Castlevaina 3 and im sure i was not getting any expanded audio!, so im not sure if this method of mod works with the combination of components i have (Front loading NES, NES Everdrive and NESRGB mod)?? Is there a Famicom game that uses exclusively expanded audio so i cant test for sure if this mod method is working??
Any ideas if i should try just bridging pins 3&9 with a resistor on the expansion port?, as i guess this could work as the NESRGB is taking the audio (from CPU pins 1&2) and then rebuilding the circuit inside the NESRGB and outputing the improved audio to the A/V socket (white wire 2 pictures above). Does the expanded Famicom audio get added before CPU pins 1&2 though or after as if its before i guess this mod wouldnt work either??