audio-edit

Clean up or mix a video's audio track — normalize loudness, reduce background noise/hiss, or add background music (optionally ducked under speech). Use whenever the user wants to fix quiet/loud/inconsistent audio, remove hiss/hum, or lay music under a talking-head/voiceover. For removing um/uh filler words use filler-removal instead; for replacing the audio entirely use plain ffmpeg map.