The correct spelling of the word "chason" is actually "chanson". The IPA phonetic transcription for this word is /ʃɑ̃.sɔ̃/, which represents the French pronunciation of the word. As French is not a phonetic language, the spelling of certain words does not always correspond to their pronunciation. In this case, the "ch" in "chanson" is pronounced like the "sh" in "shoe", while the "s" at the end of the word is silent. Therefore, it is important to know the correct spelling in order to properly pronounce and communicate this French word.