Audio Mixer
AudioLayer multiple audio tracks together into a single mix.
What is Audio Mixer?
Audio Mixer layers several audio files into one track, right in your browser. Add as many clips as you like, then set each track's volume, nudge its start offset, or mute it while you dial in the balance — the tool plays them together and renders a single WAV. Because it uses the Web Audio API locally, your files are mixed on your own device and never uploaded.
How to use Audio Mixer
Add your tracks
Drop two or more audio files onto the dropzone. Each is decoded in the browser and added as its own track with independent controls. MP3, WAV, M4A, OGG, and FLAC all work.
Balance the volumes
Use each track's Volume slider (0–150%) to blend them. Turn a backing track down and a vocal up until the mix sounds right.
Line up the timing
Set a Start offset in seconds to delay a track so it comes in later — handy for layering a sound effect, a second verse, or a drop over a bed.
Mute while you work
Toggle Mute on any track to solo the rest and hear how a layer changes the mix, without removing it. Unmute to bring it back instantly.
Preview and export
Click Preview mix to hear all tracks play together, then Download mix.wav to save the combined result as a high-quality WAV file.
Common uses
- Lay a voiceover over a background music bed
- Layer a beat, bassline, and melody into one loop
- Add sound effects on top of a narration at set moments
- Blend two versions of a take to taste
- Combine ambience with a spoken track for a podcast intro
- Build a simple multitrack mixdown without installing software
Why choose Super File Tools
Privacy-first
Most tools process your files inside your browser and never upload them to a server.
Free, no account
No sign-up, no watermark, no paid tier. Just open a tool and use it.
Instant
For local tools, work starts the moment you drop a file — no upload or queue.
Runs in your browser
Most tools are built on open web standards and work on any modern desktop browser.
No upload size caps
For local tools, nothing leaves your device, so the only limit is your machine’s memory.
Yours to keep
Results download straight to your device in clean, standard file formats.