jesseengel

import os

import librosa
import matplotlib
import matplotlib.pyplot as plt
matplotlib.rcParams['svg.fonttype'] = 'none'
import numpy as np
from scipy.io.wavfile import read as readwav

# Constants

HalfdanJ

export default function LowpassFilter(Fc) {
    var Q = 0.707;
    var K = Math.tan(Math.PI * Fc);
    var norm = 1 / (1 + K / Q + K * K);
    this.a0 = K * K * norm;
    this.a1 = 2 * this.a0;
    this.a2 = this.a0;
    this.b1 = 2 * (K * K - 1) * norm;
    this.b2 = (1 - K / Q + K * K) * norm;