Synthesis Fundamentals

How synthesizers work — from oscillators to algorithms. Platform-agnostic concepts you can apply to any synth, any DAW, any era of electronic music.

1. 1. What Is Synthesis? Sound as vibration, the harmonic series, why synthesis matters. How every synth — hardware or software — manipulates the same physics.
2. 2. Oscillators: Where Sound Begins Waveforms (sine, saw, square, triangle, noise), pitch, tuning, detuning. The raw material before anything else happens.
3. 3. Filters: Sculpting the Spectrum Low-pass, high-pass, band-pass, notch. Cutoff, resonance, filter slopes. Why the filter is the most expressive part of subtractive synthesis.
4. 4. Amplifiers and Envelopes VCA, ADSR, how envelopes shape volume over time. Why attack and release define character more than the oscillator does.
5. 5. Modulation: Making Sound Move LFOs, envelope followers, mod matrix. Vibrato, tremolo, filter sweeps. The principle: one signal controls another.
6. 6. Subtractive Synthesis The classic architecture: oscillator, filter, amplifier. How subtractive synthesis works, why it dominated for decades, and how to build a complete subtractive voice in VCV Rack.
7. 7. FM Synthesis Carriers, modulators, ratios, algorithms. Why FM synthesis can produce sounds that subtractive cannot touch — metallic bells, glassy keys, evolving textures — all from sine waves.
8. 8. Additive Synthesis Building sound from individual harmonics. The Fourier transform in plain language, drawbar organs, the Synclavier, and why additive gives you total spectral control at the cost of complexity.
9. 9. Wavetable Synthesis Morphing between snapshots of waveforms. Single-cycle waves, wavetable position, the PPG Wave, and modern wavetable engines like Vital — where the boundary between synthesis and sampling dissolves.
10. 10. Sampling as Synthesis Samplers as synthesizers, single-cycle waveforms as oscillators, the Fairlight and S1000, MPC-style chopping, and where sampling ends and synthesis begins.
11. 11. Granular Synthesis Grains, windows, spray, density. Pierre Schaeffer and musique concrete. How granular turns any recording into a synthesizer.
12. 12. Physical Modeling Simulating real instruments through math — exciters, resonators, waveguides. How a computer can model a plucked string without a single sample.
13. 13. Effects as Synthesis Tools Feedback, delay as pitch, ring modulation, vocoders. When effects stop processing and start generating.
14. 14. Patching and Signal Flow Audio rate vs control rate. CV, gates, triggers. How modular signal flow maps to any synth architecture.
15. 15. Sound Design Exercises Creative constraints for building synthesis skills — no-oscillator patches, one-voice drum machines, timed patch challenges. Constraints breed creativity.
16. 16. Sources and Further Reading Curriculum contributors, glossary, and further reading for this guide.