Electronic sound production – synthesis

Case study: recreating a trumpet

Goal
- Recreate the gist of a trumpet tone without sampling one.
High level approach
- Identify partials (harmonics) in a recorded trumpet note.
- Use several oscillators to match partial frequencies and relative levels.
- Introduce slight detune and amplitude modulation for realism.

Analog days: synthesizers in the 1960s and 1970s

Names to know
- Robert Moog, Donald Buchla, and contemporaries
Key characteristics
- Analog
- Modular
- Voltage controlled

East Coast vs West Coast synthesis

East Coast (Moog tradition)
- Start bright, then subtract using filters.
- Common patch: VCO → VCF → VCA with ADSR envelopes.
West Coast (Buchla tradition)
- Start simple, then add complexity with waveshaping and modulation.
- Common patch: complex oscillator → waveshaper/wavefolder → low-pass gate.

Moog - show by Wendy Carlos

This video shows Wendy Carlos in 1970 demonstrating the Moog synthesizer, explaining how fundamental waveforms and sound-shaping tools are used to build electronic sounds from scratch. It’s a historical glimpse into the basics of analog synthesis and early electronic music technology.

Wendy Carlos is a pioneering American composer and electronic musician best known for popularizing the Moog synthesizer and for her groundbreaking 1968 album Switched-On Bach, which introduced synthesized classical music to a wide audience. She won three Grammy Awards for this work and helped make electronic music mainstream. Carlos also composed iconic film scores, including those for Stanley Kubrick’s A Clockwork Orange and The Shining, and Disney’s Tron. She is recognized both for her musical innovations and as a trailblazer for transgender visibility in the arts.

Buchla 200e

Buchla 200e Modular Synthesizer — Brief Overview with Lecture Timestamps

About the Buchla 200e:
The Buchla 200e is an iconic modular synthesizer, designed by Don Buchla, that blends analog warmth with digital precision. Its modular architecture uses patch cables for free-form signal routing. Instead of a piano keyboard, it uses touch plates and X/Y pads for expressive, real-time control, making it ideal for experimental sound design and teaching core synthesis concepts.

Key Tutorial Moments (with Timestamps):

Oscillators & Frequency Modulation
Demonstrates analog triangle and sine wave oscillators with cross-modulation (FM), showing flexibility in timbre creation.
2:19–2:31
Envelope/Dynamics Manager
Covers Buchla’s quad function generators and characteristic low-pass gate, illustrating percussive amplitude envelopes and dynamic sound shaping.
8:34
Touch Plate Interface
Shows the expressive, non-keyboard tactile input system that enables fast, precise live modulation and interaction outside the MIDI paradigm.
12:07
Complex Waveform Generator (261e)
Explores digital and analog combined FM, symmetry, and timbral modulation for rich sound palettes.
15:53
Mixed Output / Additive Synthesis
Demonstrates mixing oscillator outputs and additive layering for evolved timbres and sound experimentation.
21:35
Harmonic Oscillator
Details control over individual harmonics—ideal for illustrating additive synthesis and organ-like tones—plus spectral morphing and modular patching.
24:08

Yamaha DX7

Context

Released 1983, early all‑digital, MIDI‑capable, and comparatively affordable.

FM essentials

Operators are sine oscillators with independent envelopes.
Carriers are audible; modulators change a carrier’s spectrum.
Algorithms define how operators connect. Small changes in index or ratio have big spectral effects.

Performance impact

Velocity and aftertouch can address operator envelopes for expressive dynamics and brightness.

Here are key moments from the “Yamaha DX7 – The Synthesizer that Defined the ’80s” video that would be effective for a sound synthesis lecture. Each timestamp corresponds to a topic critical for understanding FM synthesis, the DX7’s impact, and related sound examples:

00:43 – The Science of FM Synthesis
- Introduces John Chowning’s algorithm at Stanford (1967)
- Explains the basics of FM versus subtractive synthesis:
  - Subtractive: Complex wave filtered down.
  - FM: One wave modulates another (e.g., violin finger modulating pitch).
- Highlights why FM is powerful: easily emulates bells, marimbas, percussive tones.
02:10 – The Yamaha DX7 and FM Technology
- 1983 release, first programmable FM synth.
- Ability to create custom sounds/operators.
- Major leap from analog to digital, paving the way for precision and versatility.
02:44 – Electric Piano Sound Demonstrations
- Famous “E. Piano 1” preset becomes foundational in 1980s ballads (e.g., Chicago’s “Hard Habit to Break,” Whitney Houston’s “Didn’t We Almost Have It All”).
03:51 – Other Iconic Tones
- Demonstrates DX7’s bass and fretless bass capabilities:
  - “Take My Breath Away” (Top Gun soundtrack)
  - Kenny Loggins’ “Danger Zone”
- Harmonica emulation: Tina Turner’s “What’s Love Got to Do with It?”
05:06 – Ahead of Its Time: Storage and Programming
- User programmability, cartridges, and software/app support.
- Custom sound design: Preset culture and limitations—few custom patches were used.
05:34 – Brian Eno and Custom FM Programming
- Eno’s custom patches (shown from Keyboard Magazine).
- Use in ambient and pop music (notably “Apollo: Atmospheres and Soundtracks”).
06:11 – Cultural/Technical Legacy and ‘80s Revival
- Summarizes how the DX7 influenced new genres and is still emulated by modern artists (La Roux, Tame Impala, The Weeknd).
- Mentions Yamaha’s modern Montage synth as FM’s successor.

Basic synthesis model

Pitch and timbre source: the oscillator

Learning Synths - Oscillators

Basic Waveforms

Noise

Timbre modification: the filter

Learning Synths - Fitlers

Loudness modification: the amplifier

Applying articulation with an envelope

Learning Synths - Envelopes

Modulation sources and destinations

Learning Synths - Modulation

Methods of synthesis at a glance

Subtractive
Additive
FM and phase modulation
Wavetable
Granular
Physical modeling
Sample‑based and hybrid

Experiment with the Synth Playground