stereo_sound_for_nes
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+ | ====== Make your NES sing in stereo!! ====== | ||
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+ | {{nesstereo.gif}} | ||
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+ | This page describes a method by which you can modify Nintendo' | ||
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+ | * **How do I do that?** | ||
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+ | Well, in a nutshell, you do it by opening up your Nintendo system and tapping some wires from the CPU. | ||
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+ | * **Is that hard to do?** | ||
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+ | It depends on your expertise with electronics. If you know how to wrap wires, use a screwdriver, | ||
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+ | * **So, before I do this, I want to know how it sounds. Does it work as you say?** | ||
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+ | Okay, well, I should say that as the NES is a rather old system, it was not intended to be in stereo. Thus, NES games do not make use of stereo effects or anything like that. Here's basically how you can get stereo sound: | ||
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+ | ====== Here's how to do it: ====== | ||
+ | {{nescpu.gif|Locate the Pins!}} | ||
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+ | Open up your NES system using a Phillips head screwdriver (I'm using an oldstyle NES system, but they should all be the same; this hack worked with my Famicom clone also.) Remove all the metal shielding from the outside and underside of the circuit board. You don't really need all that shielding anyway. Pull the board out from the plastic case and turn it over to reveal all the chips 'n stuff. Locate the CPU chip. It is one of the largest chips on the board and should have "U6 CPU" written above it. Now, the first two pins on the lower left side of the CPU (if you imagine the CPU as being an x-y plane with the writing on the chip being right-side-up) are the two audio channels. These pins are the ones that are connected to resistors R3 and R4. Connect two small shielded wires to each of these pins, making sure that they don't touch each other or anything else on the board. What I did was wrap the bare end of the wire around the pins of the CPU, then solder them down, but you can just tape the wire to the pins, or to the initial legs of the resistors, if you really want to. | ||
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+ | The leftmost pin from which you tapped the audio carries a (weak) audio signal from the NES' audio channels 0 and 1. These are both from the square-wave oscillators. In other words, these are most often used as the lead instrument in music. I'd generally make that the left channel. The pin to the right of the leftmost pin carries the audio signal from channels 2, 3, and 4. These are from the triangle-wave oscillator, and the noise channel. These are almost always used as an accompanying melody and for percussion. Any digitized samples will come out of this pin. I have that mapped to the right channel. Now, plug in the power adaptor to your NES, as well as the video plug if you can. Slide a cartridge (one that has good music right as you turn it on (like Journey to Silius =)))into the slot and keep it pressed down with a rubber band if you have to. Turn on the NES and if you can see the game on the screen, try touching one of the wires which you just connected to the two pins, to the center pin of an RCA cable connected to your stereo amplifier. You should hear some sound coming out of this. If you don't then maybe you will have to touch the outer metal ring of the RCA plug to something grounded. What I used for grounding was one of the screwholes on the side of the RF modulator. | ||
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+ | {{nes-stereowiring.gif|Wiring Diagram}} | ||
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+ | After this, you can do pretty much whatever you want to the audio. I'll tell you what I did. First, I connected an Electrolytic Capacitor, rated at 1& | ||
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+ | Here's an even better trick. You don't want to mix the channels all the way, obviously, because you just did a bunch of work to get them separated. Instead, slowly lower the resistance of each of the pots while you play a game with suitably high bass (I would recommend Solstice or Silius =) ). As you lower the resistance, you should notice that at a point, the bass tones of the mono channel get mixed in before the rest of the tones. With a little bit of tweaking, you can get much-amplified bass sounds from your modified NES. When I play Solstice on my modded NES for instance, I can make the walls of my room vibrate. Ain't that great? | ||
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+ | {{nessing.gif}} | ||
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+ | From: http:// |
stereo_sound_for_nes.txt · Last modified: 2019/08/27 20:45 by 127.0.0.1