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CapCut: Manual audio ducking with keyframes

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Demo summary

The tutorial provides a detailed walkthrough of setting volume keyframes to 'duck' background music when narration begins.

Step-by-step

  1. Select the background music track in the timeline
  2. Position the playhead at the point where you want the volume change to begin
  3. Click the diamond icon next to the Volume slider in the top right to add a keyframe
  4. Move the playhead to the point where the volume change should be complete
  5. Adjust the Volume slider to the desired level to automatically generate a second keyframe
  6. Repeat the process by adding a keyframe before a speaking segment and a second keyframe during the speech to lower the volume

Options

  • Manually click the 'Add keyframe' button for the second point instead of relying on the automatic generation via volume adjustment

Watch out for

  • Two keyframes are required to create an animation; a single keyframe only sets a static value for that point

Tips

  • Think of keyframes as 'checkpoints' for specific volume values
  • Use keyframes to bring volume up during gaps in narration and 'duck' it back down whenever speaking begins to avoid competing with the background music
  • Watch the volume values change in real-time in the settings panel while scrubbing the playhead to verify the transition

Highlights

“And that's pretty much everything you need to know about keyframes. They're not too hard, they're super simple.”

All demos from “CapCut Tutorial for Beginners 2026”

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  3. 10:331:24Adjusting video framing and scaleThe creator demonstrates using the Transform panel to adjust scale, position, and rotation of a clip to improve the visual composition.CapCutAI Video Editor
  4. 12:341:35Layering B-roll on the timelineThe video shows the process of dragging multiple B-roll clips onto a secondary track above the main narration to create a layered edit.CapCutAI Video Editor
  5. 15:082:37Using markers for precise editingThe creator demonstrates how to add and name markers (M key) on the timeline to align B-roll clips perfectly with specific spoken words.CapCutAI Video Editor
  6. 19:470:57Trimming clips within the timelineThe tutorial shows the 'Trim clip' right-click feature to adjust the internal timing of a clip to capture specific camera movements like pans.CapCutAI Video Editor
  7. 20:471:02Accessing CapCut stock libraryThe creator demonstrates searching for and dragging stock footage directly from CapCut's built-in library into the project timeline.CapCutAI Video Editor
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  11. 27:371:21Applying In and Out animationsThe creator demonstrates applying specific 'In' and 'Out' animations to individual clips to create dynamic entrances and exits.CapCutAI Video Editor
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  13. 38:091:07Adding background musicThe creator demonstrates previewing and adding stock music from the Audio tab and adjusting its decibel level for background use.CapCutAI Video Editor
  14. 40:513:31Manual audio ducking with keyframesCurrentThe tutorial provides a detailed walkthrough of setting volume keyframes to 'duck' background music when narration begins.CapCutAI Audio Editor
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  18. 50:380:51Global color correctionThe tutorial shows how to adjust white balance, saturation, and contrast, then use 'Apply to all' to sync the look across the entire timeline.CapCutAI Video Enhancer
  19. 52:021:04Adding animated stickersThe creator demonstrates searching the sticker library and placing an animated sticker on the timeline with fade-in/out effects.CapCutAI Video Editor
  20. 54:510:28AI background removalThe tutorial demonstrates the 'Auto removal' tool which uses AI to rotoscope a subject and remove the video background in one click.CapCutAI Video Editor
  21. 57:091:20AI Image-to-Video generationThe creator demonstrates using CapCut's AI media tool to generate a 10-second video clip from a static reference image and a text prompt.CapCutImage to Video
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  23. Watch “CapCut Tutorial for Beginners 2026” →

AI Audio Editor

  1. 30:463:59Adding sound effects and background musicThe creator demonstrates syncing whoosh and glitch sound effects to visual animations and adjusting background music volume to -20dB.Content Creators
  2. 40:513:31Manual audio ducking with keyframesCurrentThe tutorial provides a detailed walkthrough of setting volume keyframes to 'duck' background music when narration begins.@MeticsMedia
  3. 3:340:39Adjust audio levels using waveformsThe creator shows how to open the waveform indication level and adjust clip volume to ensure spoken audio stays between -6 and -12 dB.Matt Loui
  4. 9:330:56Extract and merge audio in CapCutThe user demonstrates how to use CapCut to extract audio from multiple AI video clips and export them as a single MP3 to prepare for voice cloning.Sirio
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