Blob Opera: Sing Along with Four Harmonizing Blobs

Blob Opera is a playful musical experiment created by artist David Li for Google Arts & Culture. Instead of challenging you with levels or scores, it hands you four round, colorful blobs that sing in operatic voices, covering ranges from bass and tenor up to mezzo-soprano and soprano. You move them around, and they respond in real time with surprisingly rich sound.

The magic is in the harmony. When you guide one blob, the others automatically join in with matching notes, so even random movements tend to sound pleasant. The voices were built using machine learning trained on recordings of real opera singers, which is why the result feels expressive rather than robotic.

Because there is nothing to win or lose, Blob Opera is better described as a creative toy than a traditional game. It is a place to experiment, laugh and discover how harmony works. You can explore Blob Opera online any time, straight from your browser.

The aim: there is no win condition. The goal is simply to make music you enjoy.

Getting started: pick one of the four blobs and drag it. Moving it up raises the pitch and moving it down lowers it. Sliding it forward or backward changes the vowel sound it sings, which shifts the character of the voice. While you do this, the other blobs harmonize around your note. Try each blob in turn to hear how the low and high voices differ, and experiment with slow glides versus quick jumps.

The experience also includes the option to record a performance and share it, so you can save a melody you are proud of.

Blob Opera Controls

• Touch / tap and drag: press a blob and drag it up, down, forward or back on a touchscreen.
• Mouse: on a computer, click and hold a blob, then drag to change pitch and vowel.

Those Blob Opera controls are all you need; the fun is in exploring what they can do.

• Start with one blob. Spend a minute with a single voice to get a feel for how pitch and vowel respond.
• Move slowly for drama. Long, gradual glides sound especially operatic and let the harmony shine.
• Switch voices. The bass and soprano blobs behave very differently, so try leading with each.
• Play with vowels. Moving a blob forward and back while holding a pitch can make a melody feel more expressive.
• Try a tune you know. Picking out a simple, familiar melody is a fun way to test your ear.
• Record your best take. Use the recording option to keep a performance you like.

• Four singing blobs with distinct voice ranges
• Automatic harmony that makes any input sound musical
• Voices built with machine learning from real opera singers
• No scores or failure, just open-ended creativity
• Simple drag controls on mouse or touch
• Option to record and share a performance

This musical toy is perfect for music lovers, curious minds and anyone who wants a few minutes of joyful, low-pressure fun. No musical background is needed, which makes it great for beginners, while musicians can enjoy pushing it further.

• Chrome Music Lab – another browser-based music experiment that makes exploring sound easy and fun.
• Friday Night Funkin’ – a music game with a rhythm-battle twist, for those who want a challenge with their tunes.
• Blob.io – shares the blob theme, though it swaps singing for competitive arena action.