biquad-filter-kernel

biquad filter kernel that use simple coefficients

Installation

$ npm install --save biquad-filter-kernel

API

• constructor()
• #process(coeffs, input, output, inNumSamples): void
  • coeffs: number[] filter coefficients
    • assert(coeffs.length === 5)
    • 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");
 
const biquadFilter = new BiquadFilterKernel();
const coeffs = [ 0.000606, 0.001213, 0.000606, -1.948941, 0.951366 ];
const input = new Float32Array(1024).map(Math.random);
const output = new Float32Array(1024);
 
biquadFilter.process(coeffs, input, output, 1024);

See Also

• biquad-filter-kernel-2 / high accurate coefficients version

License

MIT