Audio Processes

9 Modulated Modifiers

9.1	Introduction
9.1.1	Variation over Time
9.1.2	Oscillators
9.2	Examples of Periodic Modulation
9.2.1	Tremolo and Autopan
9.2.2	Filter Modulation
9.2.3	Vibrato
9.2.4	Flanger and Phaser
9.2.5	Chorus
9.2.6	Modulated Modulators
9.3	Developing Processes and Learning More

9.1 Introduction

9.1.1 Variation over Time

Previous chapters have been concerned mainly with static parameters. The position of a pan control (§5.5.2, p.121), the parameters of a distortion transfer function (Chapter 7), and the centre frequency of a bandpass filter (§6.2.2, p.149) are often consistent once they have been configured. However, a manual control input can be replaced by an automatically-generated value that changes over time, producing a different style of modification ...