Input Lag on NES, Retroarch Settings Help?

General
1

Hello, I have an Anbernic RG40xx H with MustardOS 2508.3, using the fceumm libretro.so core. While playing NES roms, I’m experiencing some input lag (a delay between pressing a button and the action happening).

I’ve read that this can be fixed in the latency menu by enabling:

  1. Auto Frame Delay, and setting it to Auto.
  2. Predictive Latency Reduction, set to Double Instance mode, and 2 frames.

I have applied these settings, but I don’t feel a noticeable improvement, or if it has improved, it’s very slight.

Can anyone confirm if this is the correct approach or suggest other settings? Thanks