ReTune lets you adjust how a song plays back by scripting changes to tempo, pitch, gain, and pan during playback. Here is how you can use ReTune to speed up a section of a song and then slow it back down.
Create two marks:
1 - One at the point at which you want the song to speed up
2 - Another at the point where you want the song to slow down again
Bring up the Marks list
On iPhone:Select the "Marks" mode from the playback view to show all of the marks
On iPad:
Select the Marks tab, and select the song you are currently playing
On Mac:
View -> Marks List
Enable ReTune:
On iPhone/iPad:
Tap the ReTune button in the bottom left of the Marks toolbar - it looks like a mark with some sliders in it. It will turn orange when activated.
On Mac:
Click the ReTune button that is next to the Marks pane toggle button or select Marks -> Enable ReTune
Adjust the first Mark:
On iPhone/iPad:Tap the "i" icon next to the mark where you want the song to speed up
Go to the ReTune section, and select the icon that looks like a clock to enable tempo change
Adjust the tempo to what you want it to be using the slider
Go back to the main Marks listing
On Mac:
Click on the first mark and ensure the extra marks info panel is visible (will happen automatically when ReTune is on)
Toggle the Tempo checkbox ON
Type or adjust the slider to the desired tempo
Adjust the second Mark:
On iPhone/iPad:
Tap the "i" icon next to the mark where you want the song to slow down
Go to the ReTune section, and select the icon that looks like a clock to enable tempo change
Adjust the tempo to what you want it to be using the slider
Go back to the main Marks listing
On Mac:
Click on the second mark and ensure the extra marks info panel is visible (will happen automatically when ReTune is on)
Toggle the Tempo checkbox ON
Type or adjust the slider to the desired tempo
Now when you play the song back, ReTune will adjust the tempo as playhead passes by the mark. Any ReTune changes will also be incorporated into songs that are exported from Anytune if ReTune is enabled at the time the track is selected for export.
ReTune can be enabled or disabled per-track, and ReTune settings are saved on the marks even when it is disabled, so you can easily move between scripted playback, and dynamic playback.
Sample Mac:
Sample iPhone: