Digital Filters for Digital Audio Effects

Digital Filters for Digital Audio Effects

Gordana Jovanovic Dolecek (National Institute of Astrophysics, Mexico) and Alfonso Fernandez-Vazquez (National Institute of Astrophysics, Mexico)
DOI: 10.4018/978-1-59904-132-2.ch002
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This chapter introduces several digital filters useful for sound generation and transformation as well as for production of audio effects. It also argues that the applications of digital filters give rise to new possibilities in creating sound effects, which would be difficult and almost impossible by analog means. The problem of how to eliminate desired frequencies and noise from speech signal is considered first. Then, the effect of delay and echo is investigated, whereby single and multiple echo filters are considered. Comb filter and its modification useful for obtaining a more natural reverberation effect are also considered. Two filters proposed by Schroeder for a realization of the artificial reverberation are also given. Finally, the filters using variable delays to produce flanging and chorus effect and equalizers are described. The authors hope that this introductory text about digital filters will be useful in further investigation and applications of digital filters in generating digital audio effects.

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Table of Contents
Tomohiko Taniguchi
Hector Perez-Meana
Chapter 1
Hector Perez-Meana, Mariko Nakano-Miyatake
The development of very efficient digital signal processors has allowed the implementation of high performance signal processing algorithms to solve... Sample PDF
Introduction to Audio and Speech Signal Processing
Chapter 2
Gordana Jovanovic Dolecek, Alfonso Fernandez-Vazquez
This chapter introduces several digital filters useful for sound generation and transformation as well as for production of audio effects. It also... Sample PDF
Digital Filters for Digital Audio Effects
Chapter 3
Paulo A.A. Esquef, Luiz W.P. Biscainho
This chapter reviews audio signal processing techniques related to sound generation via additive synthesis. Particular focus will be put on... Sample PDF
Spectral-Based Analysis and Synthesis of Audio Signals
Chapter 4
Paulo A.A. Esquef, Luiz W.P. Biscainho
This chapter addresses digital signal processing techniques for sound restoration and enhancement. The most common sound degradations found in audio... Sample PDF
DSP Techniques for Sound Enhancement of Old Recordings
Chapter 5
Aparna Gurijala, John R. Deller Jr.
The main objective of this chapter is to provide an overview of existing speech and audio watermarking technology and to demonstrate the importance... Sample PDF
Digital Watermarking Techniques for Audio and Speech Signals
Chapter 6
Ronghui Tu, Jiying Zhao
In this chapter, we will introduce digital watermarking systems and quality evaluation algorithms for audio and speech signals. Originally designed... Sample PDF
Audio and Speech Watermarking and Quality Evaluation
Chapter 7
Sergio L. Netto, Luiz W.P. Biscainho
This chapter focuses on the main aspects of adaptive signal processing. The basic concepts are introduced in a simple framework, and its main... Sample PDF
Adaptive Filters: Structures, Algorithms, and Applications
Chapter 8
Mohammad Reza Asharif, Rui Chen
In this chapter, we shall study adaptive digital filtering (ADF) and its application to acoustic echo canceling (AEC). At first, Wiener filtering... Sample PDF
Adaptive Digital Filtering and Its Algorithms for Acoustic Echo Canceling
Chapter 9
Hector Perez-Meana, Mariko Nakano-Miyatake
Some of the main problems present in active noise cancellations are the feedback distortion due to the acoustic feedback between the cancellation... Sample PDF
Active Noise Canceling: Structures and Adaption Algorithms
Chapter 10
Manjunath Ramachandra Iyer
Speaker authentication has become increasingly important. It goes with the other forms of security checks such as user login and personal... Sample PDF
Differentially Fed Artificial Neural Networks for Speech Signal Prediction
Chapter 11
Sergio Suárez-Guerra, Jose Luis Oropeza-Rodriguez
This chapter presents the state-of-the-art automatic speech recognition (ASR) technology, which is a very successful technology in the computer... Sample PDF
Introduction to Speech Recognition
Chapter 12
Jose Luis Oropeza-Rodriguez, Sergio Suárez-Guerra
During the last 30 years, people have tried to communicate in an oral form with the computers, developing for this end an important amount of... Sample PDF
Advanced Techniques in Speech Recognition
Chapter 13
Speaker Recognition  (pages 371-407)
Shung-Yung Lung
This chapter presents some of the main contributions in several topics of speaker recognition since 1978. Representative books and surveys on... Sample PDF
Speaker Recognition
Chapter 14
Ingrid Kirschning, Ronald Cole
This chapter presents the development and use of speech technologies in language therapy for children with hearing disabilities. It describes the... Sample PDF
Speech Technologies for Language Therapy
About the Authors