Layer the sounds into one track.
Mix selected source audio and up to four uploaded audio files into a single output soundtrack.
Free account · Local uploads · Background processingMix audio. From source to download.
- 01
Upload your source
Sign in and upload a local file. Inspection checks the streams and duration.
- 02
Adjust the operation
The relevant settings section opens after inspection. Review the starting values below.
- 03
Preview and review
Render a short processed preview where applicable, then save and review the full task.
- 04
Convert and download
Follow background processing and download the validated output.
Mix audio settings
Choose the operation here and it stays selected through registration or sign-in. Upload and inspect your source to open its settings. Starting values are editable; check them against your file before submitting.
Mix tracks
Enabled on entry.
Mixing audio uploads
Up to four additional local audio files.
Uploaded gain
Starts at −6 dB to leave room in the combined signal.
What to check before exporting
The uploaded sounds start at the beginning of the selected range. This is a shared-start overlay, without independent drag-and-drop positions or per-file gain sliders. Use Merge Audio for sequential playback.
Choose a compatible output profile and review the source streams, selected range and final settings. Processing uses structured controls, and incompatible combinations are rejected before queueing. Download the requested result when final validation completes.
A real workspace. A result you can inspect.
This actual product screenshot shows source playback, range selection, an uploaded-audio area and encoding settings. It illustrates the shared converter; your operation opens its own relevant controls after inspection.
A processed preview creates a separate short task. It covers the first ten seconds of your range at up to 360p in a compatible format. Image and subtitle exports still need inspection of the requested final download.
Explore the Media Converter overview →
Questions about this workflow
Can I avoid clipping when several sounds overlap?
Reduce levels and consider normalization or limiting. Listen to the loudest overlap in the final result.
Can I close the tab while processing?
Yes. Submitted conversion tasks run in the background. Return to your account to check progress and download results before the retention period ends.
What are the upload and storage limits?
Current source limits are 2 GiB and two hours per file. Files have a 72-hour retention period; task, collection and resource limits also apply. The workspace shows the applicable limits. Free and Pro currently share feature access.
Keep working with your media.
Merge audio
Join audio files end to end into one recording. Choose the order, select an audio output and use compatible stream copy or re-encoding.
Normalize audio
Normalize perceived audio loudness to a LUFS target with a true-peak limit and loudness-range setting. Review the two-pass processing stages and download the result.
Replace video audio
Replace the sound in a video with an uploaded audio file. Choose how different durations should behave, preview the combination and export your new soundtrack.