/**
 * The volume lane's gain for an element at a moment in its clip.
 *
 * Volume is not scheduled onto the gain AudioParam the way FX parameters are.
 * The runtime rewrites that gain every tick from `data-volume` and the GSAP
 * seeked value, which would erase a scheduled envelope within a frame — so the
 * lane feeds the same per-tick path the probed `volumeKeyframes` already use,
 * and the render still bakes it into the samples.
 */
/**
 * Gain the lane asks for at `relTime` clip-local seconds, or null when the
 * element has no volume lane and the caller should fall back to its own rules.
 */
export declare function elementVolumeLaneGain(el: {
    getAttribute?(name: string): string | null;
}, relTime: number): number | null;
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