AES San Francisco 2012
Historical Event H1

Friday, October 26, 11:15 am — 12:15 pm (Room 121)

H1 - Popular Misconceptions about Magnetic Recording History and Theory—Things You May Have Missed over the Past 85 Years

Jay McKnight, Magnetic Reference Lab - Cupertino, CA, USA
Jeffrey McKnight, Creativity, Inc. - San Carlos, CA, USA

• Who really discovered AC Bias? The four groups that re-discovered it around 1940, including one person you've probably never heard of.
• How does AC bias actually work?
• Is a recording properly described by "surface induction"?
• The story of the "effective" gap length of a reproducing head, and a correction to Westmijze’s Gap Loss Theory.
• Does Wallace’s “Thickness Loss” properly describe the wavelength response?
• Does disconnecting the erasing head make a quieter recording?

Return to Historical Events

EXHIBITION HOURS October 27th 10am ��� 6pm October 28th 10am ��� 6pm October 29th 10am ��� 4pm
REGISTRATION DESK October 25th 3pm ��� 7pm October 26th 8am ��� 6pm October 27th 8am ��� 6pm October 28th 8am ��� 6pm October 29th 8am ��� 4pm
TECHNICAL PROGRAM October 26th 9am ��� 7pm October 27th 9am ��� 7pm October 28th 9am ��� 7pm October 29th 9am ��� 5pm
AES - Audio Engineering Society