> than in MAME. Is MAME inaccurate?
No. Mame computes the R,G,B voltage levels send to the monitor. Implicitly it is assumed that all arcade monitors are sRGB. Also implicitly it is assumed that your monitor is complying to sRGB and is calibrated.
Now, there's a real life (tm). *Real* arcade monitors have - R, G, B gain controls - R, B, B offset controls - one focus control - a limited bandwidth - either a shadow mask, a slot mask or an aperture grille. - the phosphor may or may not exhibit sRGB characteristics.
Now your monitor has (assuming an LCD monitor) - R, G, B gain controls (contrast) - R, B, B offset controls (brightness) - has a significantly higher resolution - most likely never saw a calibration device so it does not comply to sRGB standards.
For the time being I ignored ambient lightning conditions which influence color reception as well.
Consequently, when you are talking about colour it is about the colour you see on *your* monitor. On *mine* it may be different. Digital videos or pictures have had all of the above applied to the photo signal as well. In addition, the white point most likely is completely wrong (dark environment). That's why I carry around a white card with my D90 and do manual white point setting whenever I have time in darker environments. And yes, I have a Huey calibration device for my monitor.
Conclusion: Without a calibrated signal processing chain any information like screenshots and subjective impressions like "inaccurate" are only vague hints.
And Mame will never be accurate. It does come close. Anything else is purely incidental.
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