Please check if you have reverted to old versions from version 15 recently.
In Filmora 15, we have optimized the audio encoding. However, this feature is not compatible with older versions. Opening projects created in Filmora 15 directly in older versions will result in audio distortion issues.
Before reverting to an older version, please confirm whether you have any projects that require further editing. If so, save your project as a project compatible with the older version via File > Save As Legacy Project.
If the issue persists, please submit your issue through the Help - Feedback option within Filmora. Our tech team will further analyze the issue for you,
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