An Audio Envelope Generator Derived from Industrial Process Control

TL;DR

This paper introduces a novel audio envelope generator inspired by industrial process control, specifically redefining the PID algorithm to produce unique timbres and explore new musical styles.

Contribution

It formulates a new envelope generator framework based on PID control, offering an alternative to traditional ADSR envelopes for creative sound design.

Findings

PID-based envelopes can produce distinctive timbres

The new method enables novel musical expressions

Analysis shows potential for diverse sound textures

Abstract

Audio envelopes serve a crucial role in ensuring the versatility of synthesizers in producing timbres. To this end, the Attack, Decay, Release and Sustain (ADSR) envelope generator and its derivatives have been established as a mainstay in modern music. However, there may be merit in exploring alternate techniques to produce envelopes that could not only resemble ADSR but also be used to create novel timbres. Consequently, an attempt is made in this research to formulate the framework of a new envelope generator by redefining the Proportional-Integral-Derivative (PID) algorithm used in feedback-based process control. Additionally, a detailed analysis is made on the modes of operation and the nature of envelopes thus generated to establish it as a potential harbinger of distinctive styles of music.