There is some Audio on his site, but not that much, the problem is finding someone to record all the words and the storage space for all the files that would be generated.
Even with audio I am not sure it's really all that much help, I only learned by immersion, I lived in Guangzhou for 5 years, Even then I still get told I have a terrible accent
But when I travel north I get told my Mandarin has a Cantoense accent so go figure.