Principles of Digital Audio

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1. dTalApr 2017
   For work:

   Principles of Digital Audio, by Ken Pohlmann

   For play:

   Handbook of Model Rocketry, by G. Harry Stine.

   (p.s. if anyone has any suggestions for the field of imaging, I'd love to hear them as I don't know of a good imaging "bible".)

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2. dlluJan 2017
   Shaking things often fixes problems. This reminds me of the following story:

   > [O]ne of the earliest [applications] of dither came in World War II. Airplane bombers used mechanical computers to perform navigation and bomb trajectory calculations. Curiously, these computers (boxes filled with hundreds of gears and cogs) performed more accurately when flying on board the aircraft, and less well on ground. Engineers realized that the vibration from the aircraft reduced the error from sticky moving parts. Instead of moving in short jerks, they moved more continuously. Small vibrating motors were built into the computers, and their vibration was called dither from the Middle English verb "didderen," meaning "to tremble." Today, when you tap a mechanical meter to increase its accuracy, you are applying dither, and modern dictionaries define dither as a highly nervous, confused, or agitated state. In minute quantities, dither successfully makes a digitization system a little more analog in the good sense of the word.

   — Ken Pohlmann, Principles of Digital Audio

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