Take the sound with you.
Keep your video intact and make a separate WAV for narration, editing or archiving. Read a local MP4, compare the sound, and download only when you are ready. Your file stays in this browser.
Self-contained H.264 video up to 1080p with one AAC soundtrack · 1–30 seconds · up to 6 MB · mono or stereo. Silent videos, encrypted files, fragmented MP4 and other codecs are unsupported.
Peak adjustment applies one gain to both channels, preserving their balance. Amplification stops at +12 dB. It does not remove noise, repair distortion, normalize loudness or guarantee true-peak headroom.
Review your WAV
48 kHz, 16-bit PCM. Browser decoding and resampling can change the sound; this is not a lossless copy of AAC. Short audio is padded with silence and AAC padding is trimmed to the video clock. Your original video is never overwritten.
No file selected. Nothing is uploaded or played automatically.
Choose a level deliberately.
Keep decoded level extracts the soundtrack without a gain change. PCM16 conversion rounds samples to sixteen bits. If the decoded signal exceeds full scale, choose a peak ceiling instead of clipping it into the WAV.
Sample-peak adjustment moves the loudest decoded sample toward your selected ceiling. Very quiet files may stop at the +12 dB amplification limit. Silence stays silent. One gain preserves relative dynamics and stereo balance, including any existing noise. It cannot restore a clipped recording or make speech clearer.
Sample peak is different from integrated loudness and reconstructed true peak. Check your destination’s delivery requirements, listen through quiet and loud passages, and keep the original. This tool does not certify broadcast or platform compliance.
Use the audio in a reviewed video.
- Download the WAV and keep the source MP4.
- In Remixure, open Audio and music, confirm your usage rights, and choose Upload audio or Upload music. For an existing track, use its Replace audio or Replace music control.
- Review the video’s track entrance, source trim, volume and captions. Replacing primary audio clears its previous captions; Undo restores them.
- Save the video, export a new version, and listen to its finished mix before approval.
This utility does not upload the WAV or change any Studio project. The private studio separately checks workspace access, file limits and usage rights.
Open the video studio ↗Add narration to a video · Mix narration and music · More browser tools