Quoting David Thiel:
“I stumbled upon the second talk I ever gave. It was 11 years ago at the Northwest Pacific Pinball and Arcade Show. About halfway in I turn to discuss my approach to doing pinball audio. I had just finished NBA for Stern. What I said then is still true today.”
It’s queued to the time where he discusses his contributions to pinball and gives valuable insight into how he accomplishes this vital part of pinball design. Go to time 21:29 if the video doesn’t start there automatically.