Turn a four-section curve into quiet moments and a musical peak.
Energy is more than loudness
Density, repeated short notes, fewer rests, answering accompaniment and a returning theme can all change musical intensity. PicoSketch’s vertical axis is 0–100% energy; the horizontal axis is progress through the song. A higher point is not a direct percentage of loudness or pitch.
Think in four sections
Start with 16 bars for four points. Think “opening, quieter passage, peak, return” and try 55 → 30 → 85 → 55. A quieter middle can make the later peak feel stronger through contrast.
Goal
Four points
Check
Late peak
55 → 30 → 85 → 55
Is the peak distinct from the quiet passage?
Rising tension
30 → 45 → 65 → 80
Is the jump back to the start too abrupt when looping?
Calm exploration
30 → 40 → 50 → 35
Raise just one section if it feels too uniform.
Longer songs have more points
8/16 bars use four points; 32 bars use eight; 64 use sixteen; 128 use thirty-two. In long songs, each point represents a four-bar section. Changing length interpolates the curve, so review its shape afterwards. To use a four-part plan in a long song, treat the whole curve as four larger groups with smaller variations inside.
Form and curve work together
Rhythm and story forms respond differently to the same curve. Story forms also offer act-layout editing; the curve alone does not specify every theme’s order. Choose a form, fix a seed and move one point at a time for a meaningful comparison.
Edit, then generate
Drag points with a mouse or touch, or use the numeric sliders, including keyboard control. Press Generate in step 6 to apply changes. Editing the line alone does not change the completed song.
If a peak feels weak, lower surrounding sections before raising it to 100. An all-high curve has less contrast. Listen to three loops to check the return to the start. Try the energy comparison samples (Japanese).