Playback Fails or No Sound

1. Network / Access Layer

• Ensure reverse proxy does not enforce HTTP Basic Auth.
• Check server URL, certificate validity, and port availability.

2. WebDAV Response Quality

• Slow WebDAV may cause long buffering or failures.
• For cloud-drive WebDAV adapters, enable cloud mode in storage settings.

3. File and Format

• Confirm the file format is supported. The system officially supports .mp3, .m4a, .m4b, .flac, .wav, and .wma; .wma plays through server-side FFmpeg transcoding.
• Raw .aac, .ogg, .opus, and DRM-protected proprietary formats are not supported.
• When the Web player uses HLS online transcoding for .wma or some .m4b chapters, only basic playback is guaranteed. Fast forward, rewind, and arbitrary timeline seeking may be unavailable.
• Re-scan library after storage changes.
• Try another chapter to exclude single-file corruption.

4. Device/System Factors

• Disable aggressive battery optimization for Android background playback.
• Check whether other apps are taking audio focus.

Still Failing?

Inspect server logs. 404 / 401 errors usually indicate storage path or permission issues.