Digital Model of the Passive James/Baxandall Tonestack

Bennett C, Toft-Nielsen J, McCullough C. Digital Model of the Passive James/Baxandall Tonestack. In: AES Convention 135. Audio Engineering Society; 2013. Paper 124. Available from: https://aes.org/publications/elibrary-page/?id=16959

@inproceedings{Bennett2013_16959,
  author = {Bennett, Christopher and Toft-Nielsen, Jonathon and McCullough, Connor},
  title = {{Digital Model of the Passive James/Baxandall Tonestack}},
  booktitle = {AES Convention 135},
  note = {Paper 124},
  year = {2013},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=16959}
}

TY  - CPAPER
TI  - Digital Model of the Passive James/Baxandall Tonestack
AU  - Bennett, Christopher
AU  - Toft-Nielsen, Jonathon
AU  - McCullough, Connor
T2  - AES Convention 135
M1  - Paper 124
PY  - 2013
DA  - 2013/10/06
UR  - https://aes.org/publications/elibrary-page/?id=16959
PB  - Audio Engineering Society
LA  - en
AB  - E. J. James described a two-knob tone control in 1949 with easily selectable boost/cut depths as well as cutoff frequencies. This design was later popularized by P. J. Baxandall to provide negative feedback in active circuits, and was subsequently popular in many high-end amplifiers. Here, the authors analyzed the circuit in the s-domain, preserving parametric control of bass and treble potentiometer values. Poles and zeros were found using Ferrari’s solution to a quartic equation, followed by bilinear transformation to the z-domain, and finally lumping into second-order sections to produce a computationally efficient and faithful emulation of this classic tonestack.
ER  -