RC Filter Gamepad Simulator

Visualizing low-pass filter effect on gamepad input

Unfiltered Input

RC Filtered Output

RMS Amp: — Mean Delay: — Max Delay: —

Clean Input

Noisy Input

Filtered Output

Difference (Filtered - Noisy)

Filter Coeff (rcCoeff) 0

Rotation Speed (x) 1.0x

Input Magnitude 0.50

Input Noise 0.00

Chart Scale 0.50

Filter: y[n] = b0*x[n] + b1*x[n-1] - a1*y[n-1]
Add Input Noise to see how the filter handles jitter.
rcCoeff > 0: low-pass smoothing. rcCoeff < 0: jitter amplification. rcCoeff = 0: bypass.

Current input position

Filtered output position

Historical trace

Difference Equation

y[n] = b0*x[n] + b1*x[n-1] - a1*y[n-1]

Coefficient Mapping

knorm = 0 -> bypass

Live Coefficients

rcCoeff = - | b0 = - | b1 = - | a1 = -

Live Filtered Values

filteredX = - | filteredY = -

Jitter Amplification (Nyquist)

|H(-1)| = - -