code: def param_set(param):
          
          instance = param.effect.instance
  
          return 'param_set {} {} {}'.format(instance, param.symbol, param.value)
docs: ``param_set <instance_number> <param_symbol> <param_value>``
  
          set a value to given control
  
          e.g.::
  
              param_set 0 gain 2.50
  
          :param Lv2Param param: Parameter that will be updated your value