Comment by dumbotron

I got curious about something with tonal languages: how are song melodies written for them. For some, the melody matched the tones of the word. Then there's Mandarin. Mandarin just follows the melody, and you can figure out the word by context. As an English speaker, this makes ~cents~ sense. Homophones aren't a big deal. If Mandarin doesn't need tones in lyrics, why does it need them normally?