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

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

import { mix as _mix } from "@thi.ng/math/mix";
import { fract } from "@thi.ng/math/prec";
const wavetable = (table, interpolate = _mix) => {
  const n = table.length;
  const n1 = n - 1;
  return (phase, freq, amp = 1, dc = 0) => {
    phase = fract(phase * freq) * n;
    let i = phase | 0;
    let j = i < n1 ? i + 1 : 0;
    return dc + amp * interpolate(table[i], table[j], phase - i);
  };
};
export {
  wavetable
};