code: def inversion(amount)
        fail ArgumentError, 'Inversion amount must be greater than or equal to 1' if amount < 1
        fail ArgumentError, 'Not enough notes in chord for inversion' if amount >= @notes.size
  
        note_array = @notes.to_a.sort
        notes = (0...amount).collect { note_array.shift.adjust_by_semitones(12) }
        Chord.new(notes + note_array)
      end
docs: Give the Nth inversion of the chord which simply adjusts the lowest N notes up by one octive
  
   @returns [Chord] The specified inversion of chord