code: function(read_wav_file_obj, wav_input_filename, spec, cb_when_done) {
  
      // console.log("TTT ___ read_16_bit_wav_file_into_32_bit_float_buffer ___ ");
  
      // ---
  
      var property_buffer_raw_input_file = "buffer_raw_input_file";
      var property_buffer_input_file     = "buffer_input_file";
  
      read_wav_file_obj.filename = wav_input_filename;
  
      read_wav_file_obj[property_buffer_raw_input_file] = new Buffer(0);
  
      // console.log("name cb cb_parse_buffer_as_wav_format ", cb_parse_buffer_as_wav_format.name);
      // console.log("name cb cb_when_done ", cb_when_done.name);
  
      read_file_into_buffer(read_wav_file_obj, property_buffer_raw_input_file,
                                      property_buffer_input_file,
                                      cb_parse_buffer_as_wav_format,
                                      cb_when_done);
  
      // console.log("BBB ___ read_16_bit_wav_file_into_32_bit_float_buffer ___ ");
  
  }
docs: cb_parse_buffer_as_wav_format ---