@thi.ng/dsp/osc-parabolic.js

Composable signal generators, oscillators, filters, FFT, spectrum, windowing & related DSP utils

import { fract } from "@thi.ng/math/prec";
const parabolic = (phase, freq, amp = 1, dc = 0) => dc + amp * (8 * (fract(phase * freq) - 0.5) ** 2 - 1);
export {
  parabolic
};