code: function midi (note) {
    if ((typeof note === 'number' || typeof note === 'string') &&
      note > 0 && note < 128) return +note
    var p = Array.isArray(note) ? note : parse(note)
    if (!p || p.length < 2) return null
    return p[0] * 7 + p[1] * 12 + 12
  }
docs: Get the midi number of a note
  
  If the argument passed to this function is a valid midi number, it returns it
  
  The note can be an string in scientific notation or
  [array pitch notation](https://github.com/danigb/music.array.notation)
  
  @name midi
  @function
  @param {String|Array} note - the note in string or array notation
  @return {Integer} the midi number
  
  @example
  midi('A4') // => 69
  midi('a3') // => 57
  midi([0, 2]) // => 36 (C2 in array notation)
  midi(60) // => 50