Audio Processes

6 Filtering

6.1	Introduction
6.1.1	Filters and Audio Processes
6.1.2	Filtering and Acoustic Sound Sources
6.1.3	Musical Frequency Ranges
6.1.4	Frequency (Magnitude) Responses
6.2	Standard Filters
6.2.1	Lowpass and Highpass Filters
6.2.2	Bandpass and Bandreject Filters
6.2.3	Comb and Allpass Filters
6.2.4	Variations in Filter Responses
6.3	Filter Combinations
6.3.1	Common Series and Parallel Forms
6.3.2	Subtractive Techniques
6.4	Filter Designs
6.4.1	Introduction
6.4.2	Lowpass and Highpass Designs
6.4.3	Bandpass and Bandreject Designs
6.4.4	Comb and Allpass Designs
6.5	Developing Processes and Learning More

6.1 Introduction

6.1.1 Filters and Audio Processes

Filters are used in a wide range of audio processes to shape spectral envelopes. At the simplest level, filters are characterised ...