What is Audio Mixer?

Audio Mixer lets you combine multiple audio tracks with independent volume, pan, mute, and solo controls. Layer music, vocals, sound effects, and narration into a single mixed-down audio file.

Upload MP3, WAV, OGG, FLAC, AAC, M4A, or WebM files as channel strips. Each strip gets its own volume fader, pan knob, mute, and solo button. Scrub the timeline, set the total mix length, then bounce everything down to a stereo WAV or MP3 file ready to upload, send, or import into a video edit.

How to use

1. Add audio tracks by uploading files — each appears as a separate channel strip
2. Adjust volume faders, pan knobs, and use mute/solo buttons to shape the mix
3. Set the mix length and export the combined result as WAV or MP3

When to use

• Producing a podcast intro by layering bed music, host voiceover, and a stinger.
• Combining a vocal recording with a backing instrumental for a song demo.
• Building short sound design for a video — footsteps, music, ambient room tone.

Result

Creating a podcast intro — upload a background music track, a voice-over recording, and a sound effect. Pan the music slightly left, keep voice centered, set music volume to -12dB, and export the mixed intro.

FAQ

How many tracks can I load into the mixer at once?

There's no hard cap, but practical browser memory limits put it around 16-20 stereo tracks of 5 minutes each before things slow down. For most podcast or song demos, 4-8 tracks is plenty.

What does the solo button do when multiple tracks are soloed?

Soloing a track mutes every non-soloed track. If you solo three tracks, only those three play — the rest go silent. Mute on a soloed track still cuts it. Useful for checking a vocal against just the drums and bass.

Why does my exported file sound quieter than the playback in the mixer?

The output is hard-limited, so anything past 0 dB is clamped rather than left to distort. To keep real headroom, pull down the Master fader above the timeline — it scales the whole mix at once instead of you nudging every track. For a truly loud, polished master, finish with a dedicated mastering tool afterward.

Can I trim a track or fade it in and out inside the mixer?

Both, yes. Each track strip has Trim Start and Trim End sliders so you can keep just a region of a clip, plus Fade In and Fade Out sliders (up to 10 seconds, or half the trimmed length, whichever is shorter). All of it applies to playback and to the rendered export — no separate audio editor needed.

What's the difference between WAV and MP3 export?

WAV is lossless and uncompressed — best for archival or further editing. MP3 is compressed and smaller for sharing or upload; it exports at 192 kbps by default, and you can switch to 128, 256, or 320 kbps in the export bar. For a polished final, export WAV; for emailing a draft, MP3 is fine.

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