The FL Studio Piano roll feature is very useful when crafting bass lines and melodies in your music production. When you open up Piano roll, you have a large graphical interface where you can see the beats, bars, measures, notes, and note durations of your given FL Studio channel. Although it is used for harmonies when working with synths, virtual instruments, pads, and so on, it is also useful for any sound in any conceivable channel including but not limited to hi hats, kick drums, and snares. The piano roll has a larger piano area where you can toggle between real-world piano note values or images of a keyboard. You can slice your notes and perform complex edits at the click of a button. This is sometimes preferred over the step sequencer and Keyboard editor, although a mixture of both can be a great music production tool.