Figure 8 - uploaded by Maarten Van Walstijn
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Amplitude responses of the Big Muff Pi tone stack with the potentiometer at extreme ends of its rotational travel.

Amplitude responses of the Big Muff Pi tone stack with the potentiometer at extreme ends of its rotational travel.

Source publication
Conference Paper
Full-text available
Physical circuit models have an inherent ability to simulate the behaviour of user controls as exhibited by, for example, potentiometers. Working to accurately model the user interface of musical circuits, this work provides potentiometer 'laws' that fit to the underlying characteristics of linear and logarithmic potentiometers. A strategy of ident...

Context in source publication

Context 1
... Complete coefficients are omitted due to their complexity, but MAT-LAB code for calculating the transfer function is available on the companion webpage. Figure 8 shows the simulated amplitude responses of the Big Muff Pi's tone stack with the potentiometer at each end of its travel: presuming these responses to be accurate the challenge then lies in measuring intermediate responses and identifying the corresponding values of f (x). Table 4: Component values of the Big Muff Pi tone stack: specified values and the values directly measured from the circuit using an LCR meter. ...