It seems interesting!
There is a selected discography here :
https://jazzprofiles.blogspot.com/2018/06/the-search-for-roy-dunann.html
This blog seems interesting too :
There is a list here :
https://ontherecord.co/category/top-engineers/top-engineers-roy-dunann/
https://www.stereophile.com/interviews/402roy/index.html
The answer is here :