biquad-filter-kernel-2

biquad filter kernel that use high accurate coefficients

Installation

$ npm install --save biquad-filter-kernel-2

API

• constructor()
• #process(coeffs, input, output, inNumSamples): void
  • coeffs: number[][] filter coefficients
    • assert(coeffs.length === 5)
    • assert(coeffs.every(values => values.length === inNumSamples))
    • coefficients are [ b0, b1, b2, a1, a2 ] (a0 = 1)
  • input: number[] input signal
    • assert(input.length === inNumSamples)
  • output: number[] output signal
    • assert(output.length === inNumSamples)
  • inNumSamples: number number of samples

Usage

const BiquadFilterKernel = require("biquad-filter-kernel-2");

const biquadFilter = new BiquadFilterKernel();
const coeffs = [
  0.000606, 0.001213, 0.000606, -1.948941, 0.951366
].map(coeff => new Float32Array(1024).fill(coeff));
const input = new Float32Array(1024).map(Math.random);
const output = new Float32Array(1024);

biquadFilter.process(coeffs, input, output, 1024);

See Also

• biquad-filter-kernel / simple coefficients version

License

MIT