The Best Video Signal Chain for Every Retro Console

Your Super Famicom is plugged into your 4K OLED and the result looks like a watercolour painting left in the rain. That is a broken signal chain, and it is fixable. What follows routes you to the right scaler, cable, and settings for your exact console, your TV, and what you care about most: lag, sharpness, or simplicity. Every console section delivers the full chain, ordered from best picture quality to simplest setup, with the lag and visual cost of each option spelled out in milliseconds and artifacts. Find your console below and follow the chain.

The single most asked question about retro console connections is which cable to buy. The answer is a fixed ladder, and the rungs are based on how much the signal is mangled before it reaches the TV. At the bottom is RF, which combines video and audio into one carrier wave and then makes your TV separate them again. One step up is composite video, which keeps video and audio separate but still mixes luminance and chrominance into a single wire, producing dot crawl on fine patterns. S-Video splits luminance and chrominance onto two wires and kills the dot crawl. At the top, RGB SCART and component video both carry the image as three discrete signals with no mixing at all. The difference between them is the colour space: RGB uses red, green, and blue signals plus separate sync, while component video uses luminance and two colour difference signals. In practice both deliver the same sharpness when fed into a scaler that handles them correctly.

Which Cable Your Console Actually Needs

The catch is that many consoles do not output RGB or component natively. The NES and N64 require a mod. The SNES outputs RGB natively on its multi out port. The Mega Drive outputs RGB on its DIN connector. The PlayStation 1 outputs RGB through its multi out. The PlayStation 2 outputs both RGB and component natively. The GameCube outputs component only from the DOL-001 model through a proprietary cable that contains a DAC chip. The Wii outputs component from every model. The Xbox outputs component, RGB SCART, and S-Video depending on the region and cable. HD Retrovision makes component cables that include integrated transcoders for consoles like the Genesis and SNES that lack native component output. Insurrection Industries makes the SCART cables used in high end North American and export setups.

Match the Cable to Your Scaler

The cable you buy is determined by what your console outputs natively and what input your scaler takes. If your scaler takes SCART, buy an RGB SCART cable. If your scaler takes component and your console does not output it, buy an HD Retrovision cable that transcodes the RGB signal to component inside the cable itself. If you are in Hong Kong importing a Japanese console, note that JP-21 uses the same physical 21 pin connector as SCART but with a different pinout. Plugging a JP-21 cable into a SCART input or vice versa can damage equipment. Verify the pinout before you connect anything.

The signal chain has three links. The console outputs a 15kHz analogue signal over one of the cable types above. The cable carries that signal to a scaler or line doubler. The scaler converts the analogue signal to digital, resamples it to a resolution your TV can display, and sends it over HDMI. Every link adds potential delay or visual artifacts. The console output is fixed. The cable adds zero lag but can introduce noise if it is unshielded or if the ground loop hum from a 50Hz mains frequency bleeds into the audio line. The scaler is where most of the damage happens.

Line Doubling vs Framebuffer Scaling

A line doubler like the OSSC takes each scanline of a 240p image and repeats it exactly. A 240p image line doubled to 480p retains every pixel of the original with zero processing. The OSSC achieves this with no framebuffer, so lag is measured in microseconds, not milliseconds. The cost is that it cannot do non-integer scales, it cannot deinterlace 480i without a bob flicker, and it cannot apply CRT simulation filters that require a full frame buffer. A framebuffer scaler like the RetroTINK 5X Pro captures a full frame into memory, then resamples it to the target resolution using a polyphase scaler. This adds one frame of lag when the framebuffer is active, which is 16.67ms at 60Hz. The trade off is that you get motion adaptive deinterlacing for 480i games, rotation, zoom, and scanline masks that replicate the look of a Sony PVM. The RetroTINK 4K adds HDR output and 4K scanline masks at the cost of the same single frame of lag. The OSSC Pro adds a framebuffer option so you can toggle between zero lag line multiplication and framebuffer scaling depending on the game.

The 240p as 480i Failure Mode

The most destructive thing a scaler can do is misdetect a 240p signal as 480i. This is what every generic HDMI converter from Golden Computer Centre does. The converter sees a 15kHz signal and applies a video deinterlacer designed for DVD players. It discards half the vertical resolution, introduces combing artifacts on moving sprites, and adds two to four frames of buffer lag. The result looks soft, smeary, and delayed. A scaler built for retro gaming, whether the RetroTINK 5X, the OSSC, or the GBS-Control with proper firmware, detects 240p by measuring the sync timing and treats it as progressive scan. This is the single feature that separates a usable scaler from a waste of money.

Sync and Audio

The sync signal that tells the scaler where each line starts can be carried on the composite video line, on the luma line, or on a dedicated csync wire. Sync on composite is the most common and works with every scaler but can cause checkerboard artifacts on some RGB sources. Csync is cleaner but not every console outputs it. The SNES outputs csync natively. The Mega Drive outputs sync on composite. The PlayStation 1 outputs csync on pin 3 of the multi out. If your scaler drops sync during a full white flash, the console sync voltage is dipping below the scaler threshold. This is common on the SNES and is usually fixed by adding a sync stripper or switching to a cable with a built in sync regenerator. Audio embedding is another variable. Some scalers pass analogue audio through to the HDMI signal. The RetroTINK 5X and 4K both embed stereo audio from the 3.5mm input. The OSSC has no audio input and passes HDMI audio from the source if the source is HDMI. If you are using an OSSC with a SCART cable that carries audio, you need a separate audio extractor or a TV that takes analogue audio on a separate input.

The choice between RGB SCART and component video is determined by your region and your scaler, not by quality. Both carry three separate signals with no chroma subsampling. Both support 4:4:4 colour at the scaler input. Both can carry 240p and 480i. The difference is the connector and the voltage levels. RGB SCART uses a 21 pin connector with separate red, green, blue, and composite sync signals. Component video uses three RCA jacks carrying Y, Pb, and Pr. In Europe and Hong Kong where PAL consoles were sold, SCART was the standard and most CRT TVs had a SCART socket. In North America and Japan, component video was the high end consumer standard. The RetroTINK 5X Pro takes component directly through RCA jacks and SCART through a separate adapter or a breakout cable. The OSSC takes SCART directly and component through a VGA breakout cable. The RetroTINK 4K takes both natively. If you are in Hong Kong and buying a Japanese console, the console likely outputs RGB through a JP-21 connector, which uses the same physical plug as SCART but with a different pinout. You need either a JP-21 to SCART adapter or a cable made for JP-21 pinout. If you buy a PAL console from a Hong Kong second hand market, it outputs RGB SCART natively and works with any SCART scaler input. The practical difference comes down to what cables you can find. HD Retrovision component cables are widely available and require no adapter for a component scaler input. Insurrection Industries SCART cables are the standard for North American and export SCART setups. Both deliver the same pixel perfect image when the scaler handles the signal correctly. The only reason to prefer one over the other is your scaler input and your cable availability.

Console Video Output Hierarchy: Where Each Console Sits On The Ladder

The hierarchy from worst to best is RF, composite, S-Video, then RGB and component tied. Every console has a native output that sits somewhere on this ladder, and some require a hardware modification to climb higher. The NES outputs composite and RF only. To get RGB or component you need an RGB mod that taps the PPU video signal before it reaches the RF modulator. The SNES outputs composite, S-Video, and RGB natively. The 1CHIP model produces sharper RGB than earlier revisions. The SNES Jr outputs composite and S-Video but requires a mod for RGB. The N64 outputs composite and S-Video. An RGB mod or an internal HDMI mod like the UltraHDMI or N64Digital is required for component or HDMI output. The Mega Drive outputs composite, RF, and RGB natively. The Model 1 has a headphone jack that provides stereo audio. The Saturn outputs composite, S-Video, and RGB. The PlayStation 1 outputs composite, S-Video, and RGB. The PlayStation 2 outputs composite, S-Video, RGB, and component. The GameCube outputs composite and S-Video from all models. The DOL-001 model also outputs component through a proprietary digital AV port. The Wii outputs composite, S-Video, and component from all models. PAL Wiis also output RGB SCART. The original Xbox outputs composite, S-Video, component, and RGB SCART depending on the region and cable. The output hierarchy is the first thing to identify because it determines whether your best possible signal requires a cable purchase or a soldering iron.

This subject suits the Hong Kong apartment gamer with limited space who needs one display for modern and retro consoles and must understand why their Super Famicom looks like a smeared mess on their 4K OLED. It suits the competitive or feel sensitive player who perceives milliseconds of input lag and needs to know which scaler and TV settings add the least delay for rhythm games, shmups, or platformers. It suits the CRT curious enthusiast in Hong Kong who has access to second hand Sony PVMs and consumer Trinitrons from local markets but needs to understand RGB modding and 50Hz versus 60Hz regional pitfalls. It suits the capture and streaming hobbyist who needs to split a signal cleanly to both a lag free play display and a capture card without degrading either. It suits the emulation pragmatist weighing original hardware against MiSTer FPGA or software emulation on a Raspberry Pi who needs Hong Kong relevant power and connectivity advice.

Skip This If

Someone looking to buy a pre modded console as a plug and play gift with no interest in settings menus should visit a local Hong Kong retro shop to pay for a configured solution. A PC gamer trying to upscale old 3D PC titles from a Windows desktop is in the wrong place and should look at dgVoodoo2, DXVK, or driver level integer scaling guides. A modern gamer wanting better anti aliasing on a PlayStation 5 or Xbox Series X needs display side motion blur and VRR guides, not scanline generators.

Start Here

Start with your console. Identify its native output on the hierarchy. If it outputs RGB or component natively, buy the corresponding cable and a scaler that takes that input. If it outputs only composite or S-Video, decide whether you want to mod the console for RGB or buy a scaler with composite and S-Video inputs. The RetroTINK 5X Pro takes all three analogue inputs. The OSSC takes only RGB and component. The RetroTINK 4K takes everything including HDMI. The GBS-Control takes VGA, component, S-Video, and composite but requires DIY assembly and firmware flashing. The mClassic is a post processing dongle, not a primary scaler for analogue consoles. The MiSTer FPGA and Analogue Pocket are alternative hardware platforms that bypass the analogue signal chain entirely by generating digital video from FPGA logic. If you want zero lag and pixel perfect line multiplication for a 240p only console like the SNES or Mega Drive, the OSSC is the correct scaler. If you want motion adaptive deinterlacing for a 480i heavy library like the PlayStation 2, the RetroTINK 5X or 4K is the correct scaler. If you want a single device that handles every console from the NES to the Switch, the RetroTINK 4K is the ceiling of the market. The answer to every question about your specific console is in the guide that covers that console, not in this map. Read the map, find your console, and follow the chain.