Hi,

Thanks for the detailed info, we understand how frustrating that kind of glitch can be, especially when it keeps shifting after multiple renders. Since you are on CapCut Pro using a MacBook, here is a step-by-step guide to help troubleshoot and potentially fix the audio glitching issue after rendering:

1. Check the original audio file

• Play the source audio (before importing into CapCut) using QuickTime or VLC to ensure it's not corrupted.

• Use WAV format if possible (CapCut handles WAV better than MP3 or AAC sometimes).

2. Pre-render Audio in Timeline

CapCut sometimes struggles with live playback/rendering:

• Right-click on your audio layer and look for an option like “Render audio” (if available).

• This forces CapCut to pre-process the audio to avoid live decoding glitches.

3. Split & Reimport affected segments

If the glitch keeps jumping to different places:

• Try splitting your audio into smaller segments.

• Reimport only the glitched parts as separate audio clips and replace them manually.

4. Avoid heavy effects on audio

Check if you're using any of the following on the glitchy areas:

• Voice effects (like robot, echo, deep, etc.)

• Speed adjustments

• Pitch shifts

These effects can cause render inconsistencies, especially on MacBooks.

Try exporting a version without audio effects and see if the glitches disappear.

5. Use an intermediate format

Render your project in two steps:

1. Export just the audio or the whole timeline as a high-quality draft (e.g., .MOV with PCM audio).

2. Import the draft into a new CapCut project, then re-export. This can eliminate project-level rendering bugs.

6. Try using a different audio sample rate

In CapCut settings (or audio file settings):

• Check if you're mixing 44.1 kHz and 48 kHz audio.

• Keep all audio assets consistent at 48 kHz if possible (more stable for video).

7. Update or Reinstall CapCut

Even with Pro:

• Make sure you’re on the latest version from the Mac App Store.

• If the problem persists, uninstall and reinstall CapCut. Your projects and Pro account are synced to your login, but backup any local drafts first.

8. Export using different Codec settings

• Use H.264 with AAC audio, not HEVC.

• If CapCut offers a "Software Rendering" or "High Compatibility Mode" in export settings, try that.

Simplify and Isolate the Problem:

• Identify the Glitching Sections: Since the glitches are repetitive but shift, try to pinpoint if they are always in the same relative positions or if they randomly appear.
• Render Smaller Sections: Try rendering only the problematic audio sections or just the audio track itself (if CapCut allows this as an export option, or mute video layers and export as audio). This can help isolate if the issue is with the audio file itself or the rendering process.
• Replace Audio: If you suspect a specific audio clip is causing the problem, try replacing it with a fresh copy of the audio, or even a different audio file temporarily, to see if the glitch persists.
• Export Audio Separately: As a workaround, you could try exporting the audio track before rendering the final video. Then, re-import the exported audio and re-sync it with your video. This is a bit of a hassle but can sometimes bypass rendering issues.

Change Export Settings (Experimentation):

• Lower Resolution/Frame Rate: Temporarily try exporting at a slightly lower resolution (e.g., 1080p instead of 4K) or frame rate (e.g., 30fps instead of 60fps) to see if the glitches disappear. This reduces the processing load.
• Change Video Codec: While H.264 is standard, sometimes trying a different codec (if available, though CapCut might have limited options) can help.
• Bitrate: For audio, ensure the bitrate isn't set unusually low, but also avoid excessively high bitrates if not necessary, as that increases file size and processing.
• Audio Format: If you have options for audio format (e.g., AAC, MP3), try changing it.

Re-import Media:

• Re-import Audio Files: Sometimes, simply re-importing the audio files into your CapCut project can resolve minor corruption issues within the project.
• Convert Audio Files: If the audio files were originally in a less common format, try converting them to a standard format like WAV or MP3 outside CapCut before importing them.

If all else fails: temporary workaround

• Export your video without audio.

• Mix the audio separately using GarageBand, Audacity, or iMovie.

• Re-import and sync it back in CapCut or another editor. This avoids CapCut’s export audio bugs altogether.

Would you be able to:

1. Tell us what format your original audio file is in?

2. Share if you have used any audio effects or speed changes?

3. Mention which CapCut version you're currently on?

Let us know and we can give you a more targeted fix.