/** Convert a linear slider percentage to a perceptual gain multiplier. */
export declare function sliderToGain(sliderPercent: number, max?: number): number;
/** Inverse of sliderToGain – recover the slider position from a gain value. */
export declare function gainToSlider(gain: number, max?: number): number;
/** Highest boost the volume sliders allow: 200 % → 2× amplitude. */
export declare const MAX_VOLUME_PERCENT = 200;
/**
 * Slider percentage to gain, deliberately linear: 100% is unity and 200% is twice the
 * amplitude. The old cubic put unity at 79% and made 50% mean 0.25x.
 */
export declare function sliderToOutputGain(sliderPercent: number): number;