Audio Mixer

Mixing plays tracks at the same time, layered; joining plays them one after another. To join two files end to end with this mixer, set the second track's start time to the length of the first.

Singers put a vocal over a backing track, producers rebalance stems after a split, and podcasters and video creators lay narration over music. To play files one after another instead of layering them, offset the second track; to add EQ or reverb to one track, process it in the online audio editor first.

Two loud tracks played together add up past full scale, which would clip and distort. The mixer lowers the whole mix just enough to stay under -1 dB and shows the amount. Lower the loudest track yourself if you would rather decide what gives way.

Yes. A muted track is left out of the download, and while any track is soloed only the soloed tracks are mixed. Preview always plays exactly what Export will write.

No. The mix lasts until the last track ends, and a shorter track goes silent when it finishes, unless you switch on Repeat to the end: it then plays again from its start until the mix ends. When every track repeats, each plays once.

Pan, yes: each track pans from hard left to hard right by the same law as the browser’s own stereo panner, so a centred track is left exactly as it was. A mono export has nothing to pan, so the control turns off. For EQ, compression, reverb or delay, open the track in the online audio editor first, export it, and bring the processed file back here.

Every track is decoded at 44.1 kHz on the way in, so tracks recorded at different rates line up exactly, and the export is 44.1 kHz in stereo or mono.

Audio Mixer runs in the browser and draws zero credits.