BandLab Piano Roll: Enter, Edit, and Quantize Notes

Your Canvas: The Piano Roll

First things first, you need a track to work on. In BandLab, you compose using MIDI (Musical Instrument Digital Interface) on "Software Instrument" tracks. MIDI isn't audio; it's a set of instructions—like "play note C4, at this time, for this long." The software instrument (like a piano or synth) then reads these instructions and creates the sound.

Let's start by creating a new piano track. The following video gives a great overview of this process. Pay close attention to how to create a new track and select an instrument. Since your goal is to compose piano music, let's stick with a piano sound for now.

Once you've created your instrument track, you need to open the main editing window. Double-clicking on the track region opens the MIDI Editor, also known as the Piano Roll. This is where you'll spend most of your time composing.

The Piano Roll can look intimidating, but it's quite simple. Let's break down its layout.

Did you notice the piano keyboard running vertically along the left side? This is exactly what you learned about in our last lesson! It shows you which pitch you are placing a note on. The grid to its right represents time, moving from left to right. So, a note's position tells you its pitch (vertical) and its timing (horizontal).

Creating Music: Entering and Editing Notes

Now for the fun part: making some noise. Since you're working on a laptop without a keyboard, you'll be drawing notes directly onto the grid with your mouse. This method gives you total precision. The main actions you'll perform are:

• Drawing Notes: Using the pencil tool to click and create a note.
• Moving Notes: Using the pointer/move tool to change a note's pitch (up/down) or timing (left/right).
• Adjusting Length: Dragging the edge of a note to make it longer or shorter.
• Deleting Notes: Removing notes you don't want.

Let's watch a quick video that demonstrates these tools in action.

Try It Yourself

This is a hands-on skill, so let's apply it.

1. Open a new project in BandLab.
2. Create a "Software Instrument" track and choose a piano sound you like.
3. Right-click in the track lane around the first measure and select "Create Region."
4. Double-click that new region to open the Piano Roll.
5. Using the Pencil tool, try to draw the first four notes of "Twinkle, Twinkle, Little Star": C - C - G - G. Place them on the C4 and G4 lines. Don't worry about perfect timing or length yet.
6. Switch to the Move tool. Click and drag the second G note up to A. Now you have C-C-G-A.
7. Click the right edge of the first C note and drag it to make it twice as long as the second C.
8. Select the A note and press the Delete key on your keyboard to remove it.

By doing this, you've already mastered the core skills of entering and editing notes!

Polishing Your Timing: Quantization

When you draw or record notes, their timing might not be perfectly aligned with the beat of your song. Quantization is the process of automatically "snapping" your notes to the nearest line on the time grid. This is an essential tool for creating clean, rhythmically precise music.

The Audeobox article provides an excellent, concise explanation of this feature.

To see this in practice, let's go back to the "BandLab Bootcamp" video. The instructor gives a very clear demonstration of how and why you'd use this powerful tool.

Now, go back to your BandLab project. Select all the notes you drew earlier, choose a quantize value (like 1/4), and click the Quantize button. Watch them snap into perfect alignment.

Conclusion

Fantastic work today. You've moved from theory to hands-on creation, which is a huge leap. The Piano Roll is no longer an abstract concept; it's a practical tool that you can now use to bring your musical ideas to life.

Here are the key takeaways from this lesson:

• The Piano Roll is your primary canvas for composing, where pitch is vertical and time is horizontal.
• You can enter and edit notes by drawing, moving, resizing, and deleting them with simple tools.
• Quantization is a powerful feature that cleans up your timing by snapping notes to a rhythmic grid.

You now have the fundamental skills to place any note, anywhere you want, with perfect timing. In our next lesson, we will use this ability to explore the specific distances between notes—whole steps and half steps. Understanding these intervals is the key that will unlock your ability to build scales and, eventually, the emotive melodies and chords central to the music of composers like Einaudi.