@thi.ng/colored-noise/pink.js

Customizable O(1) ES6 generators for colored noise

import { ctz32 } from "@thi.ng/binary/count";
import { DEFAULT_OPTS } from "./api.js";
import { preseed, sum } from "./utils.js";
function* pink(opts) {
  const { bins = 8, scale, rnd } = { ...DEFAULT_OPTS, ...opts };
  const state = preseed(bins, scale, rnd);
  const invN = 1 / bins;
  let acc = sum(state);
  for (let i = 0; true; i = i + 1 >>> 0) {
    const id = ctz32(i) % bins;
    acc -= state[id];
    acc += state[id] = rnd.norm(scale);
    yield acc * invN;
  }
}
export {
  pink
};