RetroTINK-4K Decimation & Trim Tool

A calculator for finding the perfect decimation and negative trim settings on the RetroTINK-4K to achieve pixel-perfect downscaling before applying CRT or LCD effects.

🔗 Tool Link: https://sjftech.github.io/RT4K-Decimation-Tool/

How to Use

🚀 Using a Preset

1. Select a game profile from the dropdown (e.g., NSO, Capcom Fighting Collection, or MvC2).
2. The optimal settings appear instantly.
3. Check the Notes for required console/game settings (e.g., 1080p vs 720p).

🛠️ Using the Custom Calculator

1. Set the dropdown to Custom Calculator.
2. Temporarily crop your image on the RetroTINK-4K to align with the active game content.
   • Tip: Set Scaling Mode to "Auto Fill Integer" in the RetroTINK-4K menu to make manual alignment easier.
3. Reset crops, then enter your Input Signal, Active Area, and Target Resolution into the fields.
4. Hit Calculate Settings.

Troubleshooting

⚠️ The image is off-center!

Consoles vary in horizontal phase. If your image is 1px off-center, swap the Left/Right or Top/Bottom negative trim values.

⚠️ Bad scale match?

Changing your console output (e.g., 1080p to 720p) alters the mathematical combinations available for decimation. If you can't get a tight match at 1080p, try switching to 720p and recalculating.