Beat
A steady pulse. Here, four beats form one bar and each beat is divided into four slots.
Lesson 01 · 8 minutes
Build your first arcade loop
Make a one-bar melody that sounds coherent, repeats cleanly, and uses the same bright pulse-wave family heard in classic console music.
Three parts of a loop
Pitch
How high or low a note sounds. Higher rows in the grid produce higher pitches.
Scale
A selected collection of pitches. A small palette makes choices easier and helps notes relate.
Music theory separates when a sound happens from which pitch sounds. Meter groups the pulse into recurring beats; a scale organizes a collection of pitches. Open Music Theory explains meter, and its scale reference defines scales and the tonic.
Why it sounds retro: this toy uses a pulse-wave lead and noise percussion. The NES hardware similarly offered two pulse channels, a triangle channel, a noise channel, and a small sample channel. See the NESdev APU reference.
First, listen
The six rows below are the five pitches of C minor pentatonic—C, E♭, F, G, B♭—plus C again one octave higher. Pentatonic simply means “five-note.” Ableton's interactive explanation shows how the minor pentatonic comes from a minor scale.
Press Play. Follow the yellow playhead. Then click any two lit squares to remove them. Notice: the pitch palette stays fixed while the rhythm changes.
One square per column. Click a different row to change the pitch; click the lit square to make a rest.
Now compose
Click Clear. Build your own hook. You are not trying to find the one correct melody—there isn't one. Use this first recipe:
The restrict → repeat → return challenge
- Restrict: use only the six rows already provided.
- Repeat: use at least one pitch more than once.
- Return: make the final sounding note C5 or C6, the tonic or “home” pitch.
- Place at least six notes, then listen twice before checking.
The checker tests the recipe. Your ears decide whether the loop works.
The tonic is the pitch a scale is based on. Ending on it often creates a sense of return, which is useful at a loop boundary. It is a starting technique, not a law. Your loop may sound playful, tense, sneaky, or strange depending on its rhythm and contour.
Close the page and recall
Without looking back, say what each word controls: beat, pitch, scale, tonic. Tomorrow, rebuild a different loop from a blank grid. That small delay turns recognition into memory.
Primary follow-up
Spend 10 minutes with Ableton Learning Music: Play with notes and scales. It lets you change tonic and scale while synchronized note and beat patterns play.