[cloudmountain]

Inflections go up and down, according to the kind of Chinese one speaks but there is NO mistaking SCREAMING. There is no "screaming" inflection in any of the Han Chinese dialects.
There IS emphadsis WITHOUT screaming.

I took some basic Chinese years ago. The instructor had been in my Aerobics class and invited me to learn some Chinese. So, I did.
She was a WEALTH of information. She NEVER raised her voice in ALL her teaching and pronunciations in Mandarin or Cantonese. Screaming was NOT part of Chinese.

[buwaya]

Cantonese spoken on the street in HongKong sounds horrible, and the social norms there take getting used to. Its not the language in itself, but the way it is normally used.
Cantonese for my money is, in its typical application, one of the worlds worst sounding languages.