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NES Japanese Audio Mod - YouTube

    https://www.youtube.com/watch?v=vxGX0y-xNKo
    Japanese Famicoms have an extra audio pin out that allows some games to access special chips and add more audio channels. I took my NES and rerouted the audi...

NES Japanese Audio Mod Revisited - YouTube

    https://www.youtube.com/watch?v=-1poMbgngJ8
    I cleaned up my first mod and made it prim and professional-ish looking. I also made it easily removable and included some examples.

Open Hidden Sound Channels in the NES - RetroFixes

    http://www.retrofixes.com/2014/05/open-hidden-sound-channels-in-nes.html
    The Mod area is located under the black cartridge loading tray. Solder a resistor between pins 3 and 9 of the NES expansion connector. The resistor value can be changed to get different volume on that channel. This area is located on the top of the motherboard, near the infamous 72 pin connector. So there you have it, super simple mod and fun.

Adding Famicom Audio Channles To An NES Without …

    https://hackaday.com/2012/09/22/adding-famicom-audio-channles-to-an-nes-without-messing-up-the-console/
    This means that the Japanese cartridges can’t pipe sound to the NES audio channel with just a pin adapter. Good news though, after sourcing a pin adapter hidden inside certain NES games (Stack Up,...

Everdrive N8 & Famicom Expansion Audio to NESRGB

    http://www.firebrandx.com/edn8tonesrgb.html
    Everdrive N8 & Famicom Expansion Audio into NESRGB Mod: With the Everdrive N8 new firmware coming soon featuring improved expansion audio emulation (especially for VRC6 in Japanese Castlevania III), I decided to make a web guide with pictures on how to mix the expansion audio from the Everdrive N8 and/or a Famicom-to-NES adapter into the NESRGB board installed on a …

NES Expanded Audio: 100k Pot Mod - The Curriculum Crasher

    https://curriculumcrasher.com/2017/01/24/nes-expanded-audio-100k-pot-mod/
    By kevinrburke on January 24, 2017. Like many others, I modified my original NES with a 47k resistor to support expanded audio playback. While connecting expansion pins 3 and 9 does access the additional channels, the balance is very inconsistent. This is due to variability in the chips added to Famicom cartridges and to the Famicom Disk System and how they were …

NES Stereo Modifications with Easy Schematics - RetroFixes

    http://www.retrofixes.com/2013/09/nes-stereo-modifications-with-easy.html
    NES Stereo Modifications with Easy Schematics The NES came with a standard mono output. This was perfectly acceptable in 1986 but with the advancement in home theater systems and Chiptune musicians stereo separation is needed. This modification will bypass the hum inducing RF box, greatly improving the sound quality.

AV Famicom HVC-101 – Audio Balance Restoration Mod | RetroRGB

    https://www.retrorgb.com/av-famicom-hvc-101-audio-balance-restoration-mod.html
    AV Famicom HVC-101 – Audio Balance Restoration Mod. This is a guest post from fluxcore that details how to improve audio from your NES/Famicom and make them sound closer to the proper audio the original Famicom outputs…. Obtaining decent audio output from the Famicom and NES systems has always been an issue – the original, ‘reference’ console, the …

NES Mods - RetroRGB

    https://www.retrorgb.com/nesmods.html
    A “stereo sound” mod. The NES actually produced sound two different ways and combined them into one output. You can tap into the pre-mixed audio and modify it so they each go to their own speaker. Sometimes this produces very cool sound effects, other times it can be annoying. I have the two channels mixed through a knob:

NES/Famicom Stereo Mod

    https://www.famicomworld.com/forum/index.php?topic=11608.0
    the NES/FC isn't meant to output stereo sound. It's not like the RGB mod where deep down inside, the NES/FC is designed for RGB. It doesn't take programming skill to make the RGB work, it's always been there. Actually that is not correct. No RGB options exist inside of a standard NES or Famicom.

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