| Digest Nr | Subject and Author |
 |
| 2008.12.01.02 | Audio Recording and Automatic Gain Control, from Sam Harris |
| 2008.11.29.01 | Video Cameras and Automatic Gain Control, from Randolph Herr |
| 2008.11.27.04 | Audio Recording and Automatic Gain Control, from Alan Turner |
| 2008.11.26.03 | Audio Recording & Automatic Gain Control, from Matthew Caulfield |
| 1999.03.22.02 | More Microphone Gain for Sound Card, from Pete Woodworth |
| 1999.03.19.09 | More Microphone Gain for Sound Card, from Don Elbers |
 |