NewHome › Forums › OSSC, OSSC Pro and DExx-vd isl › OSSC – Discussion and support › Mega Drive vertical trembling › Reply To: Mega Drive vertical trembling
Yes. Optimized mode requires exact sampling rate of console dot clock output, otherwise you will get exactly those types of fuzzy or trembling columns.
Iirc, the default samplerate for 320×240 optimized is 426, but MD is more like 427 or 428. Adjust that and you should see an improvement.
(obviously, if it’s a 256 horizontal game, you need to use the 256×240 mode instead, I believe FirebrandX made a list at some point which may be googleable.
Additionally, optimized modes usually requires some adjustment to sample phase, which is under Sampling Options.
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