[feature] Add support for ISO/ANSI Standard Octave Bands

[hvianna]

Add the option to create the 1/nth octave bands based on the ISO/ANSI preferred frequencies.

Original request by Jonathan Annett.

References:

• ANSI S1.11: Specification for Octave, Half-Octave, and Third Octave Band Filter Sets
• ISO 266:1997 Acoustics — Preferred frequencies (paywall/preview only)
• All About Audio Equalization: Solutions and Frontiers
• Octave Band Frequencies
• Standard octave bands
• Renard series

[hvianna]

This is now available in version 4.0.0-beta.0

Import module directly from Skypack CDN:

import AudioMotionAnalyzer from 'https://cdn.skypack.dev/audiomotion-analyzer@beta?min';

Or install via npm on beta tag:

npm i audiomotion-analyzer@beta

Source code is in the develop branch until the stable release.