If the system microphone access is blocked at this level, the recording software is effectively deaf. The audio codec used during the recording might not be supported by your default media player.
Fix Audio Issues in Screen Recording: Check Permissions, Source, and Codec Settings
In reality, sound problems during recording usually stem from overlooked permissions, incorrect source selection, or restrictive system settings rather than a fundamental software bug. If the system volume is muted or the application volume is turned down to zero, the recording software will capture an empty audio channel, leaving you with video but no sound.
You must configure the source to capture system audio or the correct microphone. Switching to a versatile player like VLC or ensuring the correct codec packs are installed usually resolves this.
Fix Audio Issues: Configure Recording Software Sound Settings
Verifying the Recording Software Configuration Different screen recorders handle audio differently, and a misconfiguration specific to the software is a prime suspect. Some applications default to recording only microphone audio, while others are set to capture system audio.
More About Why is my screen recording not playing sound
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