A hundred knobs, four blocks
You open a synthesizer and see a wall of knobs, sliders and tabs. You browse through presets, find one that comes close to what you hear in your head, and turn a random knob to make it fit. The sound falls apart, you click back to the preset and leave it at that. This happens to almost everyone who starts out with synthesis, and the problem is not that there are too many knobs. The problem is that you do not know the floor plan yet.
Underneath almost every synthesizer lies the same floor plan: a small number of blocks in a fixed order. A source that generates the raw sound (the oscillator), a filter that shapes the timbre, an amplifier that determines the volume contour, and effects that add character. Above that sits a second floor with modulators: envelopes, LFOs, velocity and macros, which set the parameters in the chain in motion. Once you know this floor plan, you can read any unfamiliar synth, even one you have never seen before.
What you will learn in this chapter
- You recognize the signal chain of oscillator, filter, amplifier and effects on almost any synthesizer.
- You distinguish sine, triangle, square and saw by ear and know the harmonic content behind each.
- You set an ADSR envelope deliberately, instead of turning knobs until it roughly fits.
- You keep LFO and envelope apart and choose consciously between those two kinds of movement.
- You build sub bass, pluck, pad and lead from an init preset, with a working order that is repeatable.
Who this chapter is for
For anyone who wants to go beyond picking presets. You need no synthesis experience; every concept is explained the moment you use it. Any software synth with an oscillator, filter and envelope section will do, and almost every DAW ships with at least one. So you do not need to buy anything. Concepts like frequency and overtones that you are missing can be found in the free intro lessons of earlier modules.
The core idea in one paragraph
The classic way of thinking is called subtractive synthesis: you start with a sound source that is richer than you need, use the filter to remove what does not fit, give the whole a contour over time with envelopes, and add self-repeating movement with LFOs. In the following lessons you build that chain block by block. In the final lesson you turn everything into four patches from init, and with that into a skill you take with you to every synth.