I am working with the Visionarie engine to create a game. At the same time I have YouTube-channel called "MH Creative Forum".
For about a year ago I made a very interesting interview with the guy who made the sound effects to the game "Amnesia".
I thought you might be interested in how he makes his sound effects. He is a professional sound engineer.
His name is Tapio Liukkonen and you can find the interview via this link: www.youtube.com/user/mhcreativeforum .
Hope this can be helpful