Understanding Audio Sync Issues and How to Resolve Them

When you create personalized videos with Pirsonal, audio sync issues can sometimes occur when mixing different audio sources with varying audio sample rates.

This article aims to explain why this problem arises and offers solutions to help users address it effectively.

Why Do Audio Synchronization Issues Occur?

Audio synchronization issues can occur due to various factors, such as incorrect timing settings, technical glitches, or mismatches between audio and video sources. These issues can lead to audio being slightly ahead or behind the corresponding visual elements, resulting in an unsynchronized viewing experience.

To address audio synchronization problems when you create personalized or automated videos with Pirsonal, it is important to ensure that the audio and video components are properly aligned during the editing process. This involves accurately synchronizing the audio tracks with the visual elements and adjusting any timing discrepancies.

Additionally, technical issues, such as buffering or latency, should be minimized to maintain synchronization during playback.

When you combine audio from two sources with different audio sample rates, such as an MP3 music soundtrack with a 44100Hz audio sample rate and an AI text-to-speech audio file with a 48000Hz audio sample rate, audio sync discrepancies can arise.

On some occasions, the issue can also happen when using audio files with different bitrates.

This can happen, for example, when using an AI video with a music soundtrack provided by a different vendor or creator, who may utilize different settings.

What’s Audio Sample Rate?

Audio sample rate refers to the number of samples (or measurements) taken from an audio signal per second. It determines how many snapshots of the sound wave are captured in a given time frame. The sample rate is typically measured in Hertz (Hz), representing the number of samples per second.

Identifying Audio Sync Issues

One common symptom of audio sync issues is when the audio does not match the corresponding visual elements in a video. This could, for example, be when a spokesperson talks.

You may notice that the audio is either slightly ahead or behind the action on the screen. This discrepancy can be quite noticeable and may detract from the overall viewing experience.

Resolving Audio Sync Issues

If you encounter audio sync problems, there are a few steps you can take to resolve them:

  1. Use audio with the same audio sample rate: To prevent audio sync issues, it is recommended to use audio files with the same audio sample rate. When selecting audio tracks or sources for your projects, ensure that they have matching sample rates. This means using audio files with the same frequency, such as 44100Hz or 48000Hz, to maintain synchronization between audio and visual elements.
  2. Check and adjust settings: If you are experiencing audio sync issues with specific software or tools, check their settings to ensure they are configured correctly. Some applications allow you to manually adjust audio synchronization settings, which can help compensate for any discrepancies.
  3. Adjust layers in the timeline: Sometimes the audio sync issue is solved by adjusting the timeline position of the different video or audio layers. You can visually do this with Pirsonal Editor or using JSON with Pirsonal Script.
  4. Convert audio files: In situations where you have audio files with different audio sample rates, you can use audio conversion software to convert them to a unified audio sample rate. By converting the audio files to a common sample rate, you can ensure better synchronization when combining them in your projects.
  5. Contact support: If you need assistance with audio sync problems or have specific questions, please reach out to our support team by emailing Our knowledgeable support staff will be happy to help you troubleshoot the issue and find a solution.


Audio sync issues can arise when combining audio from different sources with varying audio sample rates. By using audio files with matching bitrates and taking the recommended steps to address audio sync problems, you can enhance the overall quality of your projects.

Remember, our support team is always available to assist you with any questions or concerns you may have regarding audio synchronization.

Related Articles