Shooting video on one device and capturing audio on another gives you cleaner sound, but it creates a sync problem you have to solve in post. DaVinci Resolve has built-in tools to handle this quickly, and most editors never need a third-party plugin. This guide covers the three methods that actually work, when to use each one, and how to fix it when sync goes wrong.
Why You Need to Sync Audio in DaVinci Resolve
Dual-system recording means your camera captures a reference audio track while an external microphone or recorder captures the clean, broadcast-quality sound. Those two files land on your hard drive out of alignment, and you need to match them before your edit makes sense. If you use a wireless mic system with internal backup recording, like the Hollyland LARK MAX 2’s 32-bit Float Internal Recording, the transmitter saves a separate audio file to its own memory, which is a common reason editors end up in exactly this workflow.
Use Method 1 (waveform auto-sync) for most situations. Use Method 2 (manual waveform alignment) when auto-sync fails or your camera reference track is too noisy. Use Method 3 (timecode) only when your camera and recorder were jam-synced before the shoot.
Method 1 — Auto-Sync Audio by Waveform (Recommended)
DaVinci Resolve’s built-in auto-sync analyzes the audio waveforms from both clips and snaps them into alignment automatically. It is the fastest method available and works for the majority of dual-system recordings. You can run it directly on the timeline or from the Media Pool before you even build your edit.
Steps to Auto-Sync in the Edit Page
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Place your video clip on the timeline on one track. Place your external audio clip on a separate track directly below it, roughly aligned in time.
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Select both clips by holding Shift and clicking each one.
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Right-click the selected clips and choose Auto Align Clips.
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In the dialog, select Based on Waveform and click OK.
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DaVinci Resolve analyzes both tracks and shifts the audio clip until the waveforms match.
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Play back the clip to confirm sync is correct.
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Mute or delete the camera’s scratch audio track so only the clean external audio plays through.
Note: The camera reference track needs to have a usable audio signal for waveform matching to work. If the camera mic was covered or the recording level was near zero, auto-sync will fail. In that case, move to Method 2.
Steps to Auto-Sync from the Media Pool
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In the Media Pool, select your video clip and your external audio clip at the same time. Hold Ctrl (Windows) or Command (Mac) to select both.
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Right-click the selection and choose Auto Sync Audio.
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Select Based on Waveform and click OK.
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Drag the synced clip to your timeline as a single unit.
The key difference between these two approaches is timing. The Media Pool method creates a pre-synced clip you can reuse across multiple timelines without repeating the sync step. The Edit page method works on clips already placed in your edit and adjusts them in context.
Method 2 — Manual Sync Using the Waveform
When auto-sync fails, manual alignment using a visual sync point is the most reliable fallback. A clapper board or a hand clap at the start of each take creates a sharp transient spike in both the camera audio and the external recording. That spike is easy to spot in the waveform view, and aligning the two spikes puts your tracks in sync.
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Import both your video clip and your external audio file to the timeline. Place them on separate tracks, one above the other.
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Zoom into the timeline using the scroll wheel or the zoom slider at the bottom of the timeline. Zoom in far enough that individual waveform peaks are clearly visible.
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Enable waveform display on both tracks so you can see the audio. Right-click the track header and confirm waveforms are shown.
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Locate the clap or clapper board hit on both tracks. It appears as a sharp, narrow spike that stands out from the surrounding audio.
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Click and drag the external audio clip left or right until its spike sits directly underneath the matching spike on the camera track.
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Press the spacebar to play back five to ten seconds of the clip. Listen for an echo or double-voice effect, which means the sync is still slightly off. Nudge the external audio clip with the arrow keys for fine-tuning.
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Once sync is confirmed, disable or delete the camera reference track to remove the scratch audio.
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Link the video clip and the external audio clip by selecting both, right-clicking, and choosing Link Clips. This keeps them locked together as you move things around in the edit.
Pro Tip: If you did not use a clapper board, find any sudden, sharp sound that appears in both recordings, such as a door closing or a loud consonant in dialogue. It does not have to be a clap as long as the transient is clearly visible in both waveforms.
Method 3 — Sync Audio by Timecode
Timecode sync is the fastest method of all, but it only works when your camera and external recorder were set to the same timecode before recording. This process is called jam syncing. Both devices run their internal clocks from a shared reference, so every frame of video corresponds to an exact timecode value in the audio file. DaVinci Resolve reads both and aligns them instantly.
If you are not certain your devices were jam-synced, skip this method and use Method 1 or Method 2. Timecode sync fails silently, meaning DaVinci Resolve may appear to complete the process but produce clips that are out of sync if the timecode values never matched.
Steps to sync by timecode:
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Select your video clip and external audio clip in the Media Pool while holding Ctrl or Command.
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Right-click and choose Auto Sync Audio.
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In the dialog, select Based on Timecode and click OK.
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DaVinci Resolve reads the embedded timecode from both files and aligns them to matching values.
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Drag the resulting synced clip to your timeline.
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Play back a section and verify that dialogue and lip movement are aligned before continuing your edit.
For professional shoots using dedicated audio recorders like a Sound Devices MixPre or a Zoom F-series, timecode sync is worth building into your production workflow. It eliminates the sync step in post almost entirely.
Troubleshooting — When Audio Sync Keeps Drifting or Failing
Even when you follow the steps correctly, sync problems can persist. These are the most common failure modes and how to fix them:
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Auto-sync fails to find a match: The camera reference track has too much background noise, and the waveform is too cluttered for DaVinci Resolve to identify a clear match. Try increasing the camera audio gain in the clip properties before running auto-sync again. If that does not help, switch to Method 2.
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Audio drifts out of sync over a long clip: This almost always points to a sample rate mismatch. Your camera may have recorded at 48 kHz while your external recorder captured at 44.1 kHz. Check your project settings under the Master Settings tab, then verify the sample rate in the individual clip’s properties. Transcode the offending file to match your project sample rate before re-syncing.
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Clips will not stay linked or move together after syncing: A frame rate mismatch between the clip and the project setting can break linking behavior. Confirm that your video clips, audio files, and project timeline all share the same frame rate.
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Waveforms look like a match but sync sounds wrong: DaVinci Resolve may be analyzing a stereo track and locking onto the wrong channel. Open the clip in the audio settings and switch the analysis from stereo to mono. Re-run auto-sync after making that change.
FAQ
Does DaVinci Resolve have automatic audio sync?
Yes. DaVinci Resolve includes a built-in auto-sync feature called “Auto Align Audio” on the Edit page and “Auto Sync Audio” in the Media Pool. Both can match clips by waveform or by timecode, and no third-party plugin is required to use either option.
Why is my audio out of sync after importing into DaVinci Resolve?
The most common causes are a sample rate mismatch between your camera and external recorder, or a frame rate mismatch between the clip and your project settings. Check both in the clip properties panel and under your project’s Master Settings. Correcting either one usually resolves the problem before you re-sync.
Can I sync audio from an external recorder to camera footage?
Yes, and that is the primary use case for all three methods in this guide. For best results, record a hand clap or use a clapper board at the very start of each take. That creates a sharp transient spike in both recordings, giving you a reliable reference point for both waveform auto-sync and manual alignment.
What is the difference between “Auto Align Audio” and “Auto Sync Audio” in DaVinci Resolve?
“Auto Align Audio” works on clips already placed in the Edit page timeline and adjusts them in place. “Auto Sync Audio” is accessed from the Media Pool and creates a new pre-synced clip before you add it to a timeline. Both rely on the same waveform-matching engine under the hood.
Get Your Sync Right, Then Move On
Start with waveform auto-sync, since it handles the majority of dual-system recordings in under a minute. If that fails, manual waveform alignment with a clap or slate gives you a precise fallback. Reserve timecode sync for professional workflows where the groundwork was laid on set. Once your clips are synced and linked, you are ready to explore DaVinci Resolve’s Fairlight page for further audio cleanup, including noise reduction, EQ, and level matching.
