: Ensure the "Audio Mix" slider isn't set to 0, which would prioritize your background music over the original video sound.
If you've tried these and it's still silent, does the sound the video, or is it missing while you're still editing in the preview window? Audio - AVS4YOU >> Online Help Avs video editor no sound
: Some users discovered that their audio card drivers (like Realtek) would automatically change speaker configurations, making them incompatible with AVS. A quick "reset" fix for this was opening another audio-heavy app like Skype to force Windows to reset the speaker settings to a standard 2-speaker output. : Ensure the "Audio Mix" slider isn't set
These tutorials provide visual steps for managing audio tracks and troubleshooting common sound issues in AVS: AVS Video Editor 8.0 Tutorial! Pt. 5: Audio Editing YouTube · Eagleman Trading Cards Editing Tips! Can't hear audio while editing a video YouTube · Andrina's Kreations LLC No Sound in Windows 10 Video Editor FIX [Solution] YouTube · MDTechVideos A quick "reset" fix for this was opening
: Often, the audio is present but the track itself is muted. Users have found success by right-clicking the video on the main timeline and ensuring the "Mute" option isn't checked.