Analysis of the Nonlinear Transfer Functions of a Guitar-Effect-Pedal with a Starving Circuit

Inui M, Hamasaki T, van der Veen M. Analysis of the Nonlinear Transfer Functions of a Guitar-Effect-Pedal with a Starving Circuit. In: AES Convention 148. Audio Engineering Society; 2020. Paper 10335. Available from: https://aes.org/publications/elibrary-page/?id=20752

@inproceedings{Inui2020_20752,
  author = {Inui, Masaki and Hamasaki, Toshihiko and van der Veen, Menno},
  title = {{Analysis of the Nonlinear Transfer Functions of a Guitar-Effect-Pedal with a Starving Circuit}},
  booktitle = {AES Convention 148},
  note = {Paper 10335},
  year = {2020},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=20752}
}

TY  - CPAPER
TI  - Analysis of the Nonlinear Transfer Functions of a Guitar-Effect-Pedal with a Starving Circuit
AU  - Inui, Masaki
AU  - Hamasaki, Toshihiko
AU  - van der Veen, Menno
T2  - AES Convention 148
M1  - Paper 10335
PY  - 2020
DA  - 2020/05/06
UR  - https://aes.org/publications/elibrary-page/?id=20752
PB  - Audio Engineering Society
LA  - en
AB  - Despite the recent trend of digital transformation, the popularity of Guitar-Effect-Pedal (GEP) designed has does not declined. This paper describes the complexity of the nonlinear characteristics of analog circuitry in a GEP, which originates from not only clipping diodes but also the operational amplifier. It is well known that variation in the supply voltage of a GEP influences its sound. Based on this fact, we designed a bias starving circuit to control various transfer functions. Particular attention is paid to the difference between the odd and even intermodulation distortion. Those transfer functions were analyzed, using each 9th-order polynomial approximation. The analysis indicates that the analog specific properties beyond the approximation exist under a dynamic range of approximately minus 50dB.
ER  -