Reply To: SNES correct aspect ratio in Generic 4:3 mode Line4x

[marqs]

Circles across games may not look the same, but 0.75 (more accurately 256/341) is just the portion of a scanline SNES produces active picture data. With h.active=1280 and h.samplerate ~= 1707, the active width is sampled to the 1280 pixels sent to output without any over/underscan. However, as mentioned above, it does not guarantee correct aspect ratio but just ensures optimal fitting in X-axis. You can adjust samplerate to tweak aspect to your preferences if needed, but most likely that results to some under/overscan unless your display provides some aspect ratio controls.

I’m not sure why you want to use above formula if you don’t like optimized modes. It just results to integer-number of oversampling which you don’t want with most sources if aspect ratio is the priority. The last number in the equation (4 above) also depends on LineX mode and source, see here.