How to use Multitrack Audio Mixer
- Select two to eight WAVs and check the displayed file order.
- Enter one offset, gain and mute row per file; use the same order as the selection.
- Mix the tracks, audition the first and last transitions and save the WAV and project.
Example: Multitrack Audio Mixer
Make two matching tracks overlap for half a second.
Supported inputs and limits
Where your input is processed
This tool processes your input in this browser. Your text and files are not uploaded to UseFreeTools. Check this tool's limits for anything it may save on your device.
Leave headroom where tracks overlap
Samples are added after each track gain. Two signals can peak higher together even if each source is below full scale. The tool reports the requested peak and reduces the whole mix by a single headroom gain when needed to fit sample full scale. That adjustment preserves relative track levels, but it is not loudness matching, compression or a true-peak limiter.
A saved project needs its source files
The JSON keeps track names, order and settings, rather than embedding audio. Select the same files in the same order when reusing its rows. Muting a track stops its contribution; it does not delete the source or make a long offset fit inside the timeline limit.
Questions about Multitrack Audio Mixer
Can I mix recordings with different sample rates?
No. Convert them to matching WAV rates and channels before selecting them here.
Does the project include my recordings?
No. Its JSON contains track settings. Reusing it requires selecting the same source WAVs in the same order.
Is my input uploaded?
Nothing is uploaded.