I recently caught up with seasoned Niner (Channel 9 member), Larry Osterman, an SDE and 20 year Microsoft veteran, and Elliot H Omiya, a Software Architect and audio guru, to dig into the innerworkings of Vista's updated Audio Stack and new user mode API in the latest installment of the Going Deep series on Channel 9. Much of the guts of Windows audio have been moved up into the land of the user and this has consequences for both Windows audio developers at the API level and for Windows at the general programmability, reliability and stability levels.