7
Table Of Contents
- Logic Pro 7
- Plug-In Reference
- Contents
- Introducing Logic’s Plug-ins
- Basics
- Instruments and Effects
- Equalizer
- Dynamic
- Distortion
- Filter
- Delay
- Modulation
- Reverb
- Convolution Reverb: SpaceDesigner
- Special
- Helper
- Vocoder—Basics
- The EVOC20PS
- Vocoder History
- Synthesizer Basics
- EFM 1
- ES M
- ES P
- ES E
- ES1
- ES2
- Concept and Function
- The ES2 Parameters
- Tutorials
- Sound Workshop: Logic ES2
- Tutorial Setting: Analog Saw Init
- Tutorial Setting: Analog Saw 3Osc
- Tutorial Setting: Analog Unison
- Tutorial Setting: Analog Bass clean
- Tutorial Setting: Analog Bass distorted
- Tutorial Setting: FM Start
- Tutorial Setting: FM Envelope
- Tutorial Setting: FM Drive
- Tutorial Setting: FM DigiWave
- Tutorial Setting: FM Wavetable
- Tutorial Setting: FM Megafat
- Tutorial Setting: FM Out of Tune and FM Tuned
- Tutorial Settings: PWM Start, PWM Slow, PWM Fast, and PWMScaled
- Tutorial Settings: PWM 2 Osc and PWM Soft Strings
- Tutorial Setting: Ringmod Start
- Tutorial Setting: Sync Start
- Tutorial Setting: Vector Start and Vector Envelope
- Tutorial Settings: Vector Envelope and Vector XY
- Tutorial Settings: Vector Loop
- Tutorial Setting: Vector Kick
- Tutorial Settings: Vector Perc Synth and Vector Punch Bass
- Templates for Logic’s ES2
- Sound Workshop: Logic ES2
- Ultrabeat
- Sculpture
- The Synthesis Core of Sculpture
- Sculpture’s Parameters
- Global Parameters
- String and Object Parameters
- Processing
- Post Processing
- Modulation Generators
- The Control Envelopes
- Morph
- MIDI Controller Assignments
- Programming: Quick Start Guide
- Programming: In Depth
- KlopfGeist
- EVB3
- EVD6
- The EVD6—Concept and Functions
- Parameters of the EVD6
- Controlling the EVD6 via MIDI
- A Brief History of the Clavinet
- EVP88
- EXS24 mkII
- Using Instruments
- File Organization
- Sample File Import
- EXS24 Key Commands
- A Brief History of Sampling
- MIDI Controller List
- GarageBand Instruments
- External Instrument
- Glossary
- Index
15
191
15 Vocoder History
The vocoder is over 50 years old. This chapter discusses
its history.
You may be surprised you to learn that the Voder and Vocoder date back to 1939 and
1940, respectively.
Homer Dudley, a research physicist at Bell Laboratories, New Jersey (USA) developed
the Voice Operated reCOrDER as a research machine. It was originally designed to test
compression schemes for the secure transmission of voice signals over copper phone
lines.
It was a composite device consisting of an analyzer and an artificial voice synthesizer.
These were the:
• Parallel Bandpass Vocoder—a speech analyzer and resynthesizer, invented in 1940.
• The Voder speech synthesizer—a voice model played by a human operator, invented
in 1939. This valve-driven machine had two keyboards, buttons to recreate
consonants, a pedal for oscillator frequency control, and a wrist-bar to switch vowel
sounds on and off.
The analyzer detected the energy levels of successive sound samples, measured over
the entire audio frequency spectrum via a series of narrow band filters. The results of
this analysis could be viewed graphically as functions of frequency against time.
The synthesizer reversed the process by scanning the data from the analyzer and
supplying the results to a number of analytical filters, hooked up to a noise generator.
This combination produced sounds.