note-to-frequency/cjs/lib/getPosition.js

🎼 converts a note (scientific pitch notation) to a frequency

'use strict';

exports.__esModule = true;

var _notes = require('../data/notes');

var _notes2 = _interopRequireDefault(_notes);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

exports.default = function (letter, octave) {
  var signature = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : '';

  return octave * _notes2.default.length + _notes2.default.indexOf('' + letter + signature) + 1;
};

module.exports = exports['default'];