Complex sentence: Her audience expected soul artists to have been born in poverty and have had a rough and painful life in order to sing soul music because of how emotional it is; people also expected someone with a voice like Stone's to be black.
Split into simpler sentences: Her audience expected soul artists to have been born in poverty and have had a rough and painful life in order to sing soul music because of how much emotional it is. People also expected someone with a voice like Stone's to be black.