code: def _validate_sample_rates(input_filepath_list, combine_type):
      ''' Check if files in input file list have the same sample rate
      '''
      sample_rates = [
          file_info.sample_rate(f) for f in input_filepath_list
      ]
      if not core.all_equal(sample_rates):
          raise IOError(
              "Input files do not have the same sample rate. The {} combine "
              "type requires that all files have the same sample rate"
              .format(combine_type)
          f _validate_sample_rates(input_filepath_list, combine_type):
      ''' Check if files in input file list have the same sample rate
      '''
      sample_rates = [
          file_info.sample_rate(f) for f in input_filepath_list
      ]
      if not core.all_equal(sample_rates):
          raise IOError(
              "Input files do not have the same sample rate. The {} combine "
              "type requires that all files have the same sample rate"
              .format(combine_type)
          )
docs: Check if files in input file list have the same sample rate