These three terms describe how a synth actually generates sound - a distinction that affects price, reliability and sound in genuinely different ways, beyond the often-repeated "analog sounds warmer" claim.
Analog
Sound is generated by real analog electronic circuits (oscillators, filters built from transistors/op-amps). Character comes partly from small circuit imperfections and temperature-dependent drift, which some players value and others find inconsistent. Analog synths, especially vintage ones, carry real maintenance considerations (see our article on capacitor and battery aging).
Digital
Sound is calculated numerically, often via sample playback or digital synthesis algorithms (FM, wavetable, etc.). Generally more stable, more affordable to mass-produce with many voices of polyphony, and immune to the component-aging issues analog gear faces.
Virtual-analog
Digital circuitry specifically designed to model the behavior of analog circuits, aiming to combine analog-style sound and controls with digital reliability, tuning stability and typically lower cost than genuine vintage analog gear.
None of the three is objectively "best" - the right choice depends on budget, how much hands-on tactile control matters, and whether vintage maintenance risk is something you're prepared to take on.
