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.

Authors: Inui, Masaki; Hamasaki, Toshihiko; van der Veen, Menno
Affiliations: Hiroshima Institute of Technology; Hiroshima Institute of Technology; Ir. bureau Vanderveen(See document for exact affiliation information.)
AES Convention: 148 (May 2020) Paper Number: 10335
Publication Date: May 28, 2020
Subject: Signal Processing

Click to purchase paper as a non-member or you can login as an AES member to see more options.

No AES members have commented on this paper yet.

Subscribe to this discussion

To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.

Start a discussion!

If you would like to start a discussion about this paper and are an AES member then you can login here:
Username:
Password:

If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.