Digital audio editing fundamentals

✍ Scribed by Jackson, Wallace

• Publisher: Apress
• Year: 2015
• Tongue: English
• Leaves: 151
• Category: Library

✦ Synopsis

This concise book builds upon the foundational concepts of MIDI, synthesis, and sampled waveforms. It also covers key factors regarding the data footprint optimization work process, streaming versus captive digital audio new media assets, digital audio programming and publishing platforms, and why data footprint optimization is important for modern day new media content development and distribution.

Digital Audio Editing Fundamentalsis a new media mini-book covering concepts central to digital audio editing using the Audacity open source software package which also apply to all of the professional audio editing packages. The book gets more advanced as chapters progress, and covers key concepts for new media producers such as how to maximize audio quality and which digital audio new media formats are best for use with Kindle, Android Studio, Java, JavaFX, iOS, Blackberry, Tizen, Firefox OS, Chrome OS, Opera OS, Ubuntu Touch and HTML5.

You will learn:

Industry terminology involved in digital audio editing, synthesis, sampling, analysis and processing The work process which comprises a fundamental digital audio editing, analysis, and effects pipeline The foundational audio waveform sampling concepts that are behind modern digital audio publishing How to install, and utilize, the professional, open source Audacity digital audio editing software Concepts behind digital audio sample resolution and sampling frequency and how to select settings How to select the best digital audio data codec and format for your digital audio content application How to go about data footprint optimization, to ascertain which audio formats give the best results Using digital audio assets in computer programming languages and content publishing platforms

✦ Table of Contents

Contents at a Glance......Page 5
Contents......Page 6
About the Author......Page 12
About the Technical Reviewer......Page 14
Acknowledgments......Page 15
Introduction......Page 16
AudacityTeam.org: Get Your Audacity 2.1 Software......Page 19
Audio File Formats: Installing FFMPEG and LAME......Page 22
Analog Audio: Sound Waves Formed Out of Air......Page 24
Digital Audio: Sound Waves Formed Out of Bytes......Page 26
Summary......Page 27
Rosegarden.com: Get Your Rosegarden Software......Page 28
MIDI Data: Your Musical Instrument Data Interface......Page 32
Audio Synthesis: Synthesizers Create Sound Waves......Page 33
Summary......Page 34
Sampling Digital Audio: Taking a Data Sample......Page 35
Data Sample Resolution: Data Bytes per Sample......Page 36
Data Sample Frequency: Data Samples per Second......Page 37
Recording Digital Audio: Using Audacity......Page 39
Summary......Page 41
Digital Audio Codecs: Bit Rates, Streaming, and HD......Page 42
Streaming Digital Audio Data: Setting Your Bit Rates Optimally......Page 43
MPEG-3: The Popular MP3 Digital Audio Player Data Format......Page 44
Ogg Vorbis: A Lossy High-Performance Open Source Codec......Page 45
AMR: The MPEG-4 Adaptive Multi-Rate Audio Codecs for Voice......Page 46
Summary......Page 47
Noise Reduction: Defining the Background Noise......Page 48
Noise Reduction: Removing the Background Noise......Page 51
Summary......Page 53
Audio Sample Editing: Basic Techniques......Page 54
Trimming Digital Audio: Removing Unused Data......Page 55
Extracting Audio: Selecting Sample Components......Page 56
Scrubbing Digital Audio: Sample Playback Rate......Page 57
Rearranging Digital Audio: Cut, Copy, and Paste......Page 58
Summary......Page 60
Audio Data Editing: Changing the Sample......Page 61
Cleaning the Sample: Removing Isolated Artifacts......Page 62
Sample Data Surgery: Removing Attached Artifacts......Page 63
Algorithmic Sample Surgery: Integrated Artifacts......Page 64
Summary......Page 67
Chapter 8: The Algorithms of Digital Audio: Audio Processing......Page 68
Waveform Amplitude: The Amplify Effect......Page 69
Waveform Frequency: The Pitch Shifting Effect......Page 70
Waveform Speed: Vinyl Record Playback Speeds......Page 71
Waveform Equalization: The Equalization Algorithm......Page 72
Waveform Reverberation: The Reverb Effect......Page 73
Waveform Echo Chamber: The Delay Effect......Page 74
Waveform Shaving: The Low Pass Filter Effect......Page 75
Tunneling Into Your Waveform: The Notch Filter......Page 76
Summary......Page 77
Regular Interval Labels: Automatic Sample Labels......Page 78
Sample Data Export: Export Sample Data Analysis......Page 80
Spectral Analysis: Audacity’s Plot Spectrum Dialog......Page 82
Subsample Analysis: Using the Select Tool......Page 84
Partial Subsample Analysis: Smaller Selections......Page 85
Summary......Page 88
Label Tracks: Text Label Subsample Selection......Page 89
Time Tracks: Project Time or Rate (Pitch) Warping......Page 90
Resizing and Using a Time Track: Add a Pitch Shifting Envelope......Page 91
Using Other Track Envelopes: Control Amplitude, Not Frequency......Page 93
Stereo Track to Mono Track: Conversion Algorithm......Page 94
Track Resampling: Changing the Track Sampling Frequency......Page 96
Tracks Reordering: Using the Sort Tracks Submenu......Page 97
Adding Tracks: Creating a New Track......Page 98
Dragging Tracks: Repositioning Your Track Order......Page 99
Aligning Tracks: Using the Align Tracks Feature......Page 100
Summary......Page 103
Installing Nyquist Generate Menu Plug-Ins......Page 104
Audacity Synthesizer: The Generate Menu......Page 106
Virtual Surf Waveforms: Oxygene Surf Generator......Page 107
A Virtual Metronome: The Click Track Generator......Page 109
A Virtual Tuning Fork: The Tuning Fork Generator......Page 110
Virtual Carnage: The Fire and Explosion Generator......Page 111
Virtual Cluster Bass: The KLSTRBAS Generator......Page 112
Extraterrestrial Vocals: Harmonic Noise Generator......Page 114
Virtual String Instrument: The Pluck Generator......Page 115
Summary......Page 116
Audio Optimization: Device Compatibility......Page 117
Baseline PCM File: Something to Measure Against......Page 118
Exporting Lossless Audio: FLAC Audio Format......Page 121
Exporting Lossy MP3 Audio: MPEG3 Audio Format......Page 122
Exporting Lossy M4A Audio: MPEG4 Audio Format......Page 123
Exporting Narrowband Audio: MPEG4 AMR Format......Page 124
Exporting Audio for Windows: WMA Audio Format......Page 125
The Audio Codec Results: Spanning 4 KB to 400 KB......Page 126
Summary......Page 127
Audacity’s Scripting Language: Nyquist 3......Page 128
Installing NyquistIDE: A Nyquist Integrated Editor......Page 129
The Java AudioClip Class: Digital Audio Sequencing......Page 132
The Java AudioEqualizer Class: Digital Audio Frequency Control......Page 133
Android Studio: Digital Audio Class and Interfaces......Page 134
The Android SoundPool Class: Digital Audio Sequencing Engine......Page 135
The Android AudioTrack Class: Digital Audio Compositing......Page 136
The Android MediaPlayer Class: Digital Audio Playback......Page 137
The Android MediaRecorder Class: Digital Audio Recording......Page 138
Summary......Page 139
Chapter 14: Publishing Digital Audio: Content Delivery Platforms......Page 140
HyperText Markup Language: HTML5 Digital Audio......Page 141
Open Platforms: Java, Android, and Kindle......Page 142
iTVs: Android TV, Java, JavaScript, and HTML5......Page 143
Auto Dashboard: Android AUTO, Java, and HTML5......Page 144
Game Consoles: Android, Java, JavaFX, and HTML5......Page 145
Apple iPhone and iPad: Supported Audio Formats......Page 146
Summary......Page 147
Index......Page 148