ArtplayerMP4 audio editing
Combine an MP4 with music, narration, or a replacement soundtrack while keeping the editing workflow on your device.
A useful result depends on both track choice and timing. Decide whether to replace the original soundtrack or mix it with the new audio before export.
Replace the original audio when the source sound is unwanted, private, or no longer relevant. Mix tracks when speech, ambience, or another useful element should remain underneath the new music or narration. Preview the balance so neither track masks the important content.
The added audio can be shorter or longer than the MP4. Review the beginning, transitions, and final seconds to make sure music does not stop unexpectedly and narration matches the picture. Trim the audio or video first when their useful ranges differ significantly.
Three steps to finish the browser workflow.
Open Add Audio to Video and select the MP4 you want to edit.
Choose music, narration, or another track and set how it should combine with the source.
Preview the timing, process the files, and download the video with its new soundtrack.
Core details about privacy, browser support, output, and practical limits before you start.
Choose an audio file that matches the intended MP4 timeline.
Replace the source track or mix it with the new audio based on your goal.
Preview and download the result before discarding either source file.
Quick answers about privacy, output, and practical limits before you start.
Continue editing with nearby ArtPlayer tools that work with the same browser-first workflow.
