Check out these articles:
Flavor formation by amino acid catabolism,
Flavour formation by lactic acid bacteria and biochemical flavour profiling of cheese products
Flavours of cheese products: metabolic pathways, analytical tools and identification of producing strains.
And similar ones. There's some scatted info in newer books, like the one on cheese rheology, fundamentals of cheese science, and advanced dairy chemistry.
I have read very little information, and even less accurate information on applied microbiology for affinage. I suspect most people are reluctant to share their trade secrets.