The multitrack feature in Up Tempo lets you open 2 or more tracks together. These can either play at the same time or one after the other.
When you go to open a track on the Playlist screen, you will see an option to open a new ‘Multitrack’.
This option creates an empty multitrack. Rather than seeing a single waveform at the top of the screen, you will see a button to ‘add tracks’.
Once you’ve added tracks long press on a waveform to move it in to position, trim, or add fade in/out. You will also see a mixer at the bottom where you can mute or adjust the volume of individual tracks.
Once you’ve created your multitrack you can change pitch/tempo and apply advanced effects in the same way as with a single track.