A world/continent/land/place/location where language has developed slightly differently from earth. Instead of communicating through normal speech, these beings communicate in a combination of vocabulary and pitch, almost like a song if you will. This means that one word can have several different meanings based on context and pitch. (For the purpose we can assume the people who speak this language aren't tone deaf and are all except very few able to keep proper pitch while communicating.
My question about this is how the written language would look like. Can written text somehow incorporate the right pitches for each word or even syllable? Is it even feasible to structure a written language based on this concept that has any practical applications or would communication likely take another turn? If written text is feasible, I'd like to avoid a massive alphabet like the Chinese.