Efficient Multi-Band Digital Audio Graphic Equalizer with Accurate Frequency Response Control

Oliver RJ, Jot JM. Efficient Multi-Band Digital Audio Graphic Equalizer with Accurate Frequency Response Control. In: AES Convention 139. Audio Engineering Society; 2015. Paper 9406. Available from: https://aes.org/publications/elibrary-page/?id=17963

@inproceedings{Oliver2015_17963,
  author = {Oliver, Richard J. and Jot, Jean-Marc},
  title = {{Efficient Multi-Band Digital Audio Graphic Equalizer with Accurate Frequency Response Control}},
  booktitle = {AES Convention 139},
  note = {Paper 9406},
  year = {2015},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=17963}
}

TY  - CPAPER
TI  - Efficient Multi-Band Digital Audio Graphic Equalizer with Accurate Frequency Response Control
AU  - Oliver, Richard J.
AU  - Jot, Jean-Marc
T2  - AES Convention 139
M1  - Paper 9406
PY  - 2015
DA  - 2015/10/06
UR  - https://aes.org/publications/elibrary-page/?id=17963
PB  - Audio Engineering Society
LA  - en
AB  - Graphic equalizers give listeners an intuitive way to modify the frequency response of an audio signal—simply set the sliders to visually represent the desired curve and the corresponding shape of audio filter frequency response will be invoked. At least, that is the implied promise of the technology. However, the actual measured response of the equalizer can reveal some surprises. Filter inaccuracy, boost/cut asymmetry and unexpected nulls can disappoint both the eye and the ear. An equalizer design is presented that uses efficient IIR filter sections tuned with a closed form algorithm to give an accurate and intuitive frequency response with low complexity and minimal processing overhead. Design parameters and implementation details are discussed.
ER  -