You can follow these steps to ensure the song starts from a specific point, rather than from the very beginning:
- Select the song you'd like to edit by tapping on the purple bar.
- Move your finger until the red vertical bar corresponds to the point of the song you wish to consider as a start.
- From the bottom menu, select Split: the selected song will be divided into two parts and you'll see two music icons appearing on the purple bar.
- Tap on the portion on the left and select Delete on the bottom menu
- At this point, hold your finger on the second portion and move it to the left, matching the beginning of the project.