text: import Pitch from './Pitch'
  
  /**
   * @class TwelveTet
   * @param {Number} [tuningFrequency=440] The tuning frequency in hertz.
   * @example
   * import TwelveTet from 'twelvetet'
   *
   * let twelvetet
   *
   * // instantiate with default tuning frequency of 440 Hz
   * twelvetet = new TwelveTet()
   *
   * // instantiate with given tuning frequency
   * const tuningFrequency = 432
   * twelvetet = new TwelveTet(tuningFrequency)
   */
  export default class TwelveTet {
      constructor(tuningFrequency = 440) {
          this._tuningFrequency = tuningFrequency
      }
  
      /**
       * Returns a pitch
       *
       * @function pitch
       * @memberof TwelveTet
       * @instance
       * @param {Number|String|Pitch} value
       * @example
       * import TwelveTet from 'twelvetet'
       *
       * const tuningFrequency = 440
       * const twelvetet = new TwelveTet(tuningFrequency)
       *
       *
       * let pitch
       *
       * // create a pitch with the given frequency
       * pitch = twelvetet.pitch(440)
       * console.log(+pitch)           // 440
       * console.log(pitch.toString()) // 'A4'
       *
       * // create a pitch with an out-of-tune frequency
       * pitch = twelvetet.pitch(438)
       * console.log(+pitch) // 440
       * console.log(pitch.toString()) // 'A4'
       * console.log(pitch.offset())   // 0.07887184708183335
       *
       * // create a pitch with scientific notation
       * pitch = twelvetet.pitch('A4')
       *
       * // create a pitch with another pitch
       * pitch = twelvetet.pitch(pitch.next())
       * console.log(pitch.toString()) // 'A#4'
       */
      pitch(value) {
          return Pitch.create(value, this._tuningFrequency)
      }
  }
  