About Auto Audio Mixer

Auto Audio Mixer is an After Effects utility from KiwiVFX that combines every audio layer in the active composition. It reads each layer’s and composition’s in and out points and operates recursively, so nested compositions are processed as well. The package includes nine native After Effects audio effects such as High & Low Pass, Reverb, Bass & Treble, Flanger, and Chorus. Users can choose between two layer‑mixing modes and two duration‑mix types (entire composition or work‑area length), stretch leftover audio to fill gaps, set a minimum volume, and add transitions. Additional controls let you disable interfering audio, bypass layers by tag, and use hotkeys with Easy Ease, Bezier, or linear interpolation. The tool was last updated on July 27 2023 and is listed as free.

Features

• Handles audio layer and comp in and out points
• Two audio layer mixing options plus two duration mix types (composition or work area duration)
• Nine included After Effects audio effects, including High & Low pass, reverb, Bass & Treble, and Flanger and Chorus
• Works on compositions recursively
• Stretch audio leftovers to mix with the next layer or fill duration
• Disable interfering audio, bypass an audio layer by tag, and set minimum volume
• Hotkeys with keyframe interpolation (Easy Ease, Bezier or linear)

Best for

After Effects users who need to automate audio layer mixing across single and nested compositions.