# Mix vs reference
Source: https://docs.aden.space/docs/help/more/mix-reference-tool

A free tool at tools.aden.space/reference. Drop a mix and a released song to hear them level-matched at the same spot, and see where the lows, mids and highs differ. Both files stay in the browser.
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## What it is [#what-it-is]

Hold your mix up to a released song you want it to sound like. Open
`tools.aden.space/reference`, or search "reference" in ⌘K. No account needed,
and nothing is uploaded.

## Using it [#using-it]

* **Drop your mix**, then a reference song: on the **Add a reference song**
  lane, or anywhere on the panel. Drop both at once and the second is the
  reference.
* **Switch** with the play buttons, **1** and **2**, or the arrow keys. Both
  play in step, so a switch keeps the same spot.
* **Match** is on: the louder song is turned down to the quieter one, so
  louder never passes for better.
* **Tone** shows, per band, how much more (+) or less (−) of it your mix has
  than the reference, in dB, measured while they play. Amber is 3 dB or more.
* **Loudness**, **Auto**, **Loop** and **Blind** work as in a track's
  [compare](./track-version-compare.md).
* **Save as track** adds your mix to Aden.