Ah .... sorry Jon, I think you guessed, and this is probably a cardinal EOSHD sin but the audio setup (Sennheiser 416, Rycote suspension, RME FF800 pre / interface) cost me more than the camera and kit lens
That said, the onboard mic / AD convertor isn't too shabby. With a decent pop filter and maybe something like this: https://www.seelectronics.com/reflexion-filter-pro you could get decent results ... maybe.