# Make a mashup
Source: https://docs.aden.space/docs/help/free-tools/key-finder/make-a-mashup

Fit acapellas to an instrumental in one key and tempo, cut and fade them, and save the mix to Aden with its stems.
Drop an instrumental and a few acapellas, and the Key finder pitches and speeds each one to fit.

## Line up the songs [#line-up-the-songs]

1. Open the [Key finder](https://tools.aden.space/key) and drop an instrumental and one or more acapellas. You can also add songs by name or link.
2. The instrumental becomes the anchor: its key is the target and its tempo is the mix tempo. Every other track shows how far it is pitched and sped.
3. Check the chip beside the tempo: **Great match**, **Good match** or **Hard match**. Open it to see what each track needs.
4. Press play to hear them together.

To fit everything to another track, open its … menu and choose **Fit the others to this track**.

## Arrange the playlist [#arrange-the-playlist]

* Drag a clip by its top strip to move it. Its beats snap to the anchor's. Hold Alt to place it freely.
* Drag a clip's left or right edge to cut it, and drag a top corner inward to fade it.
* Each track has mute, solo and a level. Drag the grip before a name to reorder, and double click a name to rename it.
* Minus and plus beside play change the whole mix's tempo. Press a track's key and speed to set its own.
* Pinch, or hold Ctrl or ⌘ and scroll, to zoom.
* Full screen, hold Alt or ⌥ and scroll, or drag the ends of the scrollbar beside the tracks, to make them taller or slimmer.

## Split a song into acapella and instrumental [#split-a-song-into-acapella-and-instrumental]

Point at a track and press the layers button, **Split into acapella and instrumental**. It takes about a minute and adds both parts under the track.

<Callout>
  Splitting needs an Aden account on the Max plan.
</Callout>

## Change notes or record [#change-notes-or-record]

* **Edit notes** (the tuning fork on a track) moves the notes of a sample, or turns minor into major. It works like the [Note editor](/docs/help/your-music/midi-editor/note-editor).
* **Record** adds a lane so you can sing over the mix.

## Save the mix [#save-the-mix]

Press **Save to Aden** under the playlist. Aden opens on a new track with the mix, in the target key and tempo, and each track as a stem. Songs you found by name or opened from Aden are linked as the originals, and their teams are asked to approve.

## Related [#related]

* [Put a DJ set in order](/docs/help/free-tools/key-finder/order-a-dj-set)
* [Find a song's key and BPM](/docs/help/free-tools/key-finder/find-a-songs-key)