Snapback Filter Info

Understanding Snapback Filters on Your Controller

Some controllers include features called snapback filters, which help reduce unwanted joystick inputs caused by the stick snapping back to center too quickly. Depending on the game you’re playing, one filter may work better than another - or you may want to turn filtering off entirely.

This article explains the three available options: Auto, LPF, and Off.

Auto Filter

The Auto filter is an aggressive snapback suppression method. It works by detecting when the joystick is moving quickly toward the center position. If the velocity of the stick is high enough to cause snapback, the filter will zero out the joystick input for a short period (about 7ms).

Strengths

  • Very effective at eliminating snapback.

  • Works well for games like Super Smash Bros. Ultimate and others with larger input buffers, where a brief pause in input doesn’t hurt gameplay.

Weaknesses

  • Can interfere with precision in games like Super Smash Bros. Melee, which rely on extremely tight input timing.

LPF (Low-Pass Filter)

The LPF filter uses a low-pass filter approach, which smooths out the joystick signal by letting slower changes through while filtering out faster, sharper changes.

In simple terms:
Imagine drawing a smooth line through a jagged graph. The low-pass filter “ignores” quick spikes (like snapback waveforms) but still follows the overall movement of the stick.

Strengths

  • Reduces snapback without cutting inputs entirely.

  • Keeps gameplay fluid and more responsive for Melee, where very short timing windows matter.

Weaknesses

  • Not as aggressive at removing snapback as the Auto filter.

  • Some small residual snapback may slip through.

Off

Choosing Off disables all snapback filtering. The controller will send raw joystick data exactly as it is, with no corrections.

Strengths

  • Best if you want a completely untouched signal.

Weaknesses

  • Snapback effects will appear if your stick has noticeable rebound.

Summary

  • Auto: Best for Ultimate and games with forgiving input buffers. Strong suppression but may disrupt precise inputs.

  • LPF: Best for Melee and games that need precise, continuous control. Smoother but less aggressive.

  • Off: No filtering at all - use if your stick is stable or if you prefer raw input.