by KiwiVFX·Audio
Images © KiwiVFX. Used for product review; image policy.
Earns its place in the toolfarm library for automating audio layer mixing across an entire composition, including recursive comps, with a bundled set of After Effects audio effects.
Auto Audio Mixer is an After Effects tool from KiwiVFX that mixes all audio layers of the active composition. It reads each layer's and comp's in and out points, and works on compositions recursively, so nested comps are covered as well.
The tool ships with nine After Effects audio effects, including High & Low pass, reverb, Bass & Treble, and Flanger and Chorus. Two audio layer mixing options and two duration mix types let you mix over either the composition or the work area duration. You can stretch audio leftovers to mix with the next layer or to fill the duration, set a minimum volume, and add transitions between layers.
Control options include disabling interfering audio and bypassing an audio layer by tag. Hotkeys support keyframe interpolation with Easy Ease, Bezier or linear, and the interface is responsive with persistent values. A demo video is available, and the tool was last updated on July 27, 2023.
Auto Audio Mixer is best for after Effects users mixing audio layers across single and nested compositions.
Auto Audio Mixer is completely free to download and use.
Auto Audio Mixer lists compatibility across a wide range of After Effects versions, from CS3, CS4, CS5, CS5.5 and CS6 through CC, CC 2014, CC 2015, CC 2015.3, CC 2017, CC 2018 and CC 2019, up to the 2020, 2021, 2022 and 2023 releases. The stated requirements match that same version list, so both older builds like CS6 and newer ones like CC 2019 are covered. If you run a version outside this range, check KiwiVFX's page to confirm before installing on your particular setup.
Auto Audio Mixer includes nine After Effects audio effects. The named ones are High & Low pass, reverb, Bass & Treble, and Flanger and Chorus, with additional effects rounding out the set. Alongside the effects, the tool offers two audio layer mixing options and two duration mix types, letting you mix over either the composition or the work area duration. It also provides minimum volume control and transitions between layers. For the complete effect list, the developer's page is the place to check.
Auto Audio Mixer is listed as free in this catalog. Licensing terms can change over time, so for the current details it's worth checking KiwiVFX's own page before you download. Beyond cost, the tool mixes all audio layers of the active composition, handles audio layer and comp in and out points, and works on compositions recursively. It also lets you disable interfering audio and bypass an audio layer by tag, so you can control which layers take part in the mix.
Auto Audio Mixer works on compositions recursively, so it processes audio through nested compositions rather than only the top level. It handles audio layer and comp in and out points, and can stretch audio leftovers to mix with the next layer or to fill the duration. Two duration mix types let you base the mix on either the composition or the work area. Hotkeys support keyframe interpolation using Easy Ease, Bezier or linear, giving control over how the mixed audio transitions between layers.
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