Automatic Analog Preamp Gain Control Using Digital Command

Sturmel N, Yu F. Automatic Analog Preamp Gain Control Using Digital Command. In: AES Convention 135. Audio Engineering Society; 2013. Paper 125. Available from: https://aes.org/publications/elibrary-page/?id=16960

@inproceedings{Sturmel2013_16960,
  author = {Sturmel, Nicolas and Yu, Fusheng},
  title = {{Automatic Analog Preamp Gain Control Using Digital Command}},
  booktitle = {AES Convention 135},
  note = {Paper 125},
  year = {2013},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=16960}
}

TY  - CPAPER
TI  - Automatic Analog Preamp Gain Control Using Digital Command
AU  - Sturmel, Nicolas
AU  - Yu, Fusheng
T2  - AES Convention 135
M1  - Paper 125
PY  - 2013
DA  - 2013/10/06
UR  - https://aes.org/publications/elibrary-page/?id=16960
PB  - Audio Engineering Society
LA  - en
AB  - Automatic Gain Control (AGC) is a common tool for field recording, but it usually requires specific hardware such as voltage controlled amplifiers. In this paper, we address the problem of designing an AGC when none of this hardware is present, using an ubiquitous digitally controlled high end analog preamp. To do this, we have to overcome two problems: fixed gain steps and variable delay of the gain command. In order to propose an efficient solution, we will first study the effects of each of those two problems. Finally, a very simple digitally controlled automatic gain, but of high quality will be proposed, using only 10MIPS of processing power from our high end USB sound card.
ER  -