Record the sound source of the actual Nintendo Famicom in stereo [MOTHER]

MOTHER spoiler alert?

Hi, I'm kohanii.

This site sells a kit to turn your Nintendo Famicom into a pseudo-stereo system.

How to make a Nintendo Famicom video output modification kit (FCAV) board

Instructions for creating a Nintendo Famicom video output conversion kit board for converting the Nintendo Famicom to an...

This pseudo-stereo takes advantage of the fact that the Nintendo Famicom audio is output from two separate pins on 2A03.

Image from NesDev
http://wiki.nesdev.com/w/index.php/File:Neswires.jpg

AUX A outputs two pulse channels, and AUX B outputs triangle, noise, and DPCM.

Originally, these two were mixed to mono (R5, R4) and output through a cassette.(Details from the schematic link above).
In this kit, the two are mixed well on the left and right to create pseudo-stereo.

So, to find out how it works, I recorded the AUX A and B outputs.

System Requirements

The System Requirements looks like this.

I modified the kit mentioned above to have AUX B on the left and AUX A on the right for stereo output.

I used a ZOOM U-44 to record at 96KHz 24bit.

I have not advanced MOTHER that far, so I recorded as much background music as I could.

Try to listen

The audio is MP3 with the highest possible quality. (48KHz approx. 290Kbps)
FLAC (96KHz 16bit) with lossless compression is also scheduled to be released.

The image is from this kit.