low-pass-filter

A low pass filter.

Install

npm install low-pass-filter

Use

Browser

Use the low-pass-filter.js file in the /dist folder:

<script src="./dist/low-pass-filter.js"></script>
<script>
lowPassFilter.lowPassFilter(samples, 22050, 44100, 2);
</script>

Or load it from the jsDelivr CDN:

<script src="https://cdn.jsdelivr.net/npm/low-pass-filter"></script>

Or load it from unpkg:

<script src="https://unpkg.com/low-pass-filter"></script>

Node

const lowPassFilter = require('low-pass-filter').lowPassFilter;
lowPassFilter(samples, 22050, 44100, 2);

API

/**
 * Low pass filter.
 * @param {!Array<number>|TypedArray} samples The samples.
 * @param {number} cutoff The cutoff frequency.
 * @param {number} sampleRate The sample rate.
 * @param {number} numChannels The number of channels.
 */
function lowPassFilter(samples, cutoff, sampleRate, numChannels) {}

References

https://github.com/jiaaro/pydub/blob/master/pydub/effects.py#L187
http://stackoverflow.com/questions/13882038/implementing-simple-high-and-low-pass-filters-in-c

LICENSE

Copyright (c) 2018 Rafael da Silva Rocha.
Copyright (c) 2011 James Robert, http://jiaaro.com

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.