Musical Signal Processing with LabVIEW

Instructor: Ed Doering

Institution: Rose-Hulman Institute of Technology

Course Number: ECE 481

"Musical Signal Processing with LabVIEW" is a multimedia educational resource for students and faculty that augments traditional DSP courses and supports dedicated courses in music synthesis and audio signal processing. Each of the learning modules blends video, text, sound clips, and LabVIEW virtual instruments (VIs) into explanation of theory and concepts, demonstration of LabVIEW implementation techniques to transform theory into working systems, and hands-on guided project activities. Screencasts -- videos captured directly from the computer screen with audio narration and a hallmark of this resource -- use a mixture of hand-drawn text, animations, and video of the LabVIEW tool in operation to provide a visually rich learning environment

Contents

• Preface: Musical Signal Processing with LabVIEW

LabVIEW Programming Techniques for Audio Signal Processing

• Getting Started with LabVIEW
• Editing Tips for LabVIEW
• Essential Programming Structures in LabVIEW
• Create a SubVI in LabVIEW
• Arrays in LabVIEW
• Audio Output Using LabVIEW's "Play Waveform" Express VI
• Real-Time Audio Output in LabVIEW 
• Audio Sources in LabVIEW 
• Reading and Writing Audio Files in LabVIEW

Introduction to Audio and Musical Signals

• Perception of Sound 
• [ mini-project ] Musical intervals and the equal-tempered scale

Analog Synthesis and Modular Synthesizers

• Analog Synthesis Modules         
• [ mini-project ] Compose a piece of music using analog synthesizer techniques

MIDI for Synthesis and Algorithm Control

• MIDI Messages        
• Standard MIDI Files 
• Useful MIDI Software Utilities
• [ mini-project ] Parse and analyze a standard MIDI file
• [ mini-project ] Create standard MIDI files with LabVIEW        
• [ LabVIEW application ] MIDI_JamSession

Tremolo and Vibrato Effects (Low-Frequency Modulation)

• Tremolo Effect        
• [ mini-project ] Vibraphone virtual musical instrument (VMI) in LabVIEW
• Vibrato Effect        
• [ mini-project ] "The Whistler" virtual musical instrument (VMI) in LabVIEW

Modulation Synthesis

• Amplitude Modulation (AM) Mathematics
• Pitch Shifter with Single-Sideband AM 
• [ mini-project ] Ring Modulation and Pitch Shifting        
• Frequency Modulation (FM) Mathematics 
• Frequency Modulation (FM) Techniques in LabVIEW
• Chowning FM Synthesis Instruments in LabVIEW        
• [ mini-project ] Chowning FM Synthesis Instruments

Additive Synthesis

• Additive Synthesis Techniques
• Additive Synthesis Concepts
• [ mini-project ] Risset Bell Synthesis
• [ mini-project ] Spectrogram Art

Subtractive Synthesis

• Subtractive Synthesis Concepts
• Interactive Time-Varying Digital Filter in LabVIEW
• Band-Limited Pulse Generator
• Formant (Vowel) Synthesis
• Linear Prediction and Cross Synthesis 
• [ mini-project ] Linear Prediction and Cross Synthesis
• Karplus-Strong Plucked String Algorithm
• Karplus-Strong Plucked String Algorithm with Improved Pitch Accuracy

Sound Spatialization and Reverberation

• Reverberation
• Schroeder Reverberator
• Localization Cues

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