audio-filter

WORK IN PROGRESS, please get back after a while to not get disappointed.

Collection of digital filters, for audio & dsp applications.

Usage

Produce 1024 samples of grey noise:

const WhiteNoise = require('audio-noise/white')
const LoudnessFilter = require('audio-filter/loudness')

//create noise generator
let noise = WhiteNoise()

//create filter instance
let filter = LoudnessFilter()

//generate frame of gray noise
let data = filter(noise(new Float32Array(1024)))

API

Filters can be used separately as require('audio-filter/<type>') or as a bundle require('audio-filter').<type>. Every filter constructor creates a filtering function based on options. options may provide filter-specific parameters, usually numbers or functions for varying parameters.

const createFilter = require('audio-filter/<some>')
let filter = createFilter(options)

let data = filter(samples)

Implemented filters:

• leaky
• biquad
• loudness
• lowpass
• hipass
• rumble
• flutter
• noise
• bessel
• butterworth
• matched
• elliptical
• linkwitz-riley
• chebyshev
• savitzky-golay
• curve (custom f-curve)

Filters

leaky({lambda: 0.95, y: 0})

Leaky integrator.

See also

• a-weighting — collection of frequency weighting curves.