To most of my research so far, it is the visual of speech sounds. When you look through a dictionary, you'll usually see these things under the main word you're looking for.
For example, you take a word like "Seahorse". You have the word type, and below the word type, you see some fancy looking text.
I will bold this mini dictionary bit for you to show you what we're focusing on.
Seahorse
Noun
/ˈsēhôrs/
The text in bold here is what you're looking for when you want to find the "Phonetic Transcription." Hope this helps!
Answer: by providing a clue that uncovers the treasure
Explanation:
The rest of the excerpt is showing to us what exactly caused their reaction to the spring. They are looking forward to it because as they said ''The treasure is in the spring, between the ash tree and the silver beech.''
''XAVIER The joyous sounds of spring. The joyous sounds of the spring. The spring! KENNETH (Jumping up) Where rocks and pebbles sing. The water going over the rocks and pebbles. And you can't get to it in the wintertime because the spring is frozen then. XAVIER (From behind the trees) The treasure is in the spring, between the ash tree and the silver beech.''
We can see that they are happy because of the sound of the spring and now they will be able to find the treasure since in the wintertime everything is under the snow.
There is not enough information please give more