fader

A fader is a sliding control used to adjust the level of a signal in audio, lighting, or video systems. The term is most commonly linked to audio mixing consoles, where faders govern the relative level of individual channels in the final mix. Faders enable smooth real-time changes in level during live performances, recording, or post-production.

In analog audio consoles, each channel strip includes a fader that sets the level sent to the mix bus. The fader position corresponds to a voltage from a potentiometer, producing a gain change. Many modern desks use motorized, or soft, faders, which can be automated and recalled for different scenes or performances.

The crossfader on a DJ mixer blends two input sources, allowing quick transitions and scratching. In larger studios, motorized faders may be grouped into banks or layers for fast access during mixing, and automation tracks can control fader moves.

In lighting control, faders adjust lighting parameters (often intensity) on a lighting console. They can be physical sliders or virtual controls. Fade times determine how quickly lights reach their target level, enabling smooth transitions between lighting states.

In video work, faders can refer to controls for fade transitions between video sources or to fades in audio tracks. Some video switchers and editors implement fader-style controls for fades as part of the timeline or user interface.