For those of you who wants to dig into the project you might find these info useful.........
An introduction to digital audio
Table of Contents
Preface
Ch. 1. Introducing digital audio
Ch. 2. Conversion
Ch. 3. Some essential principles
Ch. 4. Digital coding principles
Ch. 5. Digital audio interfaces
Ch. 6. Digital audio tape recorders
Ch. 7. Magnetic disk drives
Ch. 8. Digital audio editing
Ch. 9. Optical disks in digital audio
Glossary
Index
An Introduction to Digital Audio.part1.rar
An Introduction to Digital Audio.part2.rar
An Introduction to Digital Audio.part3.rar
Also,
Using The Low Cost, High Performance ADSP-21065L Digital
Signal Processor For Digital Audio Applications
TABLE OF CONTENTS
0. INTRODUCTION................................4
1. SELECTING AN AUDIO SIGNAL PROCESSOR.....................5
1.1 GENERAL PURPOSE DIGITAL SIGNAL PROCESSORS AND DECODERS FOR AUDIO ......................5
1.2 PRICE ....................................ERROR! BOOKMARK NOT DEFINED.
1.3 PROCESSOR SPEED ..........................5
1.4 ON-CHIP MEMORY..........................7
1.5 I/O CAPABILITIES AND INTERFACES FOR PROCESSING OF AUDIO SAMPLES ..........................7
1.5.1 DMA (Direct Memory Access) Controllers.........................7
1.5.2 Serial Interface to Audio Converters and other Digital Audio Devices........7
1.6 DSP NUMERIC DATA FORMATS : FIXED/FLOATING POINT ARITHMETIC............9
1.6.1 1.6.0 16/24/32-Bit Fixed-Point Arithmetic ..................10
1.6.2 Floating-Point Arithmetic ......10
1.7 DOUBLE-PRECISION FIXED POINT ARITHMETIC VERSUS SINGLE-PRECISION ARITHMETIC.......11
1.8 THE IMPORTANCE OF DYNAMIC RANGE IN DSP-AUDIO PROCESSING ....11
2. USEFUL DSP HARDWARE/SOFTWARE BUILDING BLOCKS FOR AUDIO.............18
2.1 BASIC ARITHMETIC OPERATIONS 18
2.2 IMPLEMENTING CONVOLUTION WITH ZERO-OVERHEAD LOOPING, MULTIPLY/ACCUMULATE INSTRUCTIONS
(MAC), AND DUAL MEMORY FETCHES ........18
2.3 HARDWARE CIRCULAR BUFFERING FOR EFFICIENT STORAGE/RETRIEVAL OF AUDIO SAMPLES ........19
2.4 ZERO-OVERHEAD LOOPING..........20
2.5 BLOCK PROCESSING VS. SAMPLE PROCESSING ...........20
2.6 DELAY-LINES.................................20
2.7 SIGNAL GENERATION WITH LOOK-UP TABLES ...............21
3. IMPLEMENTING DSP AUDIO ALGORITHMS.............23
3.1 BASIC AUDIO SIGNAL MANIPULATION .............23
3.1.1 Volume Control.........24
3.1.2 Mixing Multiple Audio Signal Channels.......24
3.1.3 Amplitude Panning of Signals to a Left or Right Stereo Field......25
3.2 FILTERING TECHNIQUES AND APPLICATIONS............29
3.2.1 The FIR Filter ........................29
3.2.2 The IIR Filter .........................30
3.2.3 Parametric Filters...................31
3.2.4 Graphic Equalizers .................33
3.2.5 Comb Filters ...........................35
3.2.6 Scaling to Prevent Overflow...36
3.3 TIME-DELAY DIGITAL AUDIO EFFECTS......................37
3.3.1 Digital Delay - (Echo, Single Delay, Multi-tap Delays and ADT) .......37
3.3.2 Delay Modulation Effects.......44
3.3.2.1 Flanger Effect .................................... 45
3.3.2.2 Chorus Effect ..................................... 48
3.3.2.3 Vibrato................................................ 54
3.3.2.4 Pitch Shifter ....................................... 54
3.3.2.5 Detune Effect...................................... 55
3.3.3 Digital Reverberation Algorithms for Simulation of Large Acoustic Spaces.........55
3.4 AMPLITUDE-BASED AUDIO EFFECTS.........61
3.4.1 Tremolo - Digital Stereo Panning Effect...................61
3.4.2 Signal Level Measurement.....62
3.4.3 Dynamics Processing..............63
3.4.3.1 Compressors and Limiters ................ 63
3.4.3.2 Noise Gate/Downward Expander ..... 66
3.4.3.3 Expanders........................................... 67
3.5 SOUND SYNTHESIS TECHNIQUES...67
3.5.1 Additive Synthesis ...................67
3.5.2 FM Synthesis ..........................68
3.5.3 Wavetable Synthesis ...............68
3.5.4 Sample Playback ....................68
3.5.5 Subtractive Synthesis..............69
4. CONCLUSION...................................69
Digital Audio Applications PDF
ENJOY!!!!!!!!!!
and see you in about another few years time...................
:grin:
Got some more ebooks on PCI and Computer Engineering when you are ready.
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