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Google’s Blob Opera received a festive holiday update on December 23, 2021. It added falling snow, Santa hats, a “Let it Snow” control and eight Christmas songs that users could perform with the animated voices. The update was temporary: by December 31, the Christmas playlist had been removed and replaced with “Auld Lang Syne.”
The standard Blob Opera experiment remains documented on Google Arts & Culture, but Google’s official page does not confirm that the 2021 Christmas mode is currently available.
What Blob Opera does
Blob Opera is a Google Arts & Culture machine-learning experiment created with artist David Li. It presents four animated opera voices: tenor, bass, mezzo-soprano and soprano.
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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsUsers control the blobs in real time. Dragging a blob up or down changes its pitch, while moving it forward or backward changes its vowel sound. The other voices respond by harmonizing automatically, so no singing experience is required.
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Google says the model was trained with 16 hours of singing recorded by four opera singers: Christian Joel, Frederick Tong, Joanna Gamble and Olivia Doutney. Additional singing was provided by Ingunn Gyda Hrafnkelsdottir and John Holland-Avery. The experience generates its vocal output from the trained model; it is not simply playing back the singers’ original recordings.
The eight Christmas songs
The holiday version offered this selection:
- “Jingle Bells”
- “Silent Night”
- “Joy to the World”
- “Hark! The Herald Angels Sing”
- “Away in a Manger”
- “O Come All Ye Faithful”
- “The First Noel”
- “Once in Royal David’s City”
These were songs available in the seasonal experience reported in December 2021—not evidence of a permanent playlist or newly composed Blob Opera originals.
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- Instrumentation: Piano/Keyboard
How the holiday mode worked
In December 2021, visitors could open Blob Opera, activate the festive “Let it Snow” mode, choose a Christmas song and manipulate the blobs while they performed its melody. The interface added a snowy background and Santa hats to the four characters.
The experience’s appeal was the combination of familiar holiday melodies with real-time experimentation. A user could alter one voice’s pitch or vowel sounds while the other synthetic opera voices supplied an automatic harmony.
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- Pages: 80
- Instrumentation: Piano/Keyboard
A short-lived Christmas update
Google promoted the festive update on December 23, 2021, and reports indicated that the Christmas songs were live by December 24. They did not remain through the holiday season: by December 31, 2021, the Christmas songs had been removed and replaced with “Auld Lang Syne” for New Year’s celebrations.
The update was therefore a seasonal layer on top of Blob Opera, not a separate app or a permanent Christmas edition. Present-tense headlines can make the story sound current, but the holiday release belongs specifically to Christmas 2021.
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Can you still play the Christmas songs?
Current status: the main Blob Opera experiment is still listed on Google Arts & Culture, but the eight-song Christmas mode has not been verified as available in 2026. Do not expect the Santa hats, snow or “Let it Snow” control to appear simply because the original article or an archived post shows them.
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Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →If the standard experiment loads, the basic controls remain the same: move blobs vertically to change pitch and horizontally to change vowel sounds. Google warns that the experience may not perform optimally on older devices. Browser audio can also require an initial interaction before it starts, and a current version may look different from screenshots captured during the 2021 update.
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- 16 pagesSize: 12" x 9"Composer: Andrew Lloyd WebberISBN: 079351312X
You can try the underlying experiment through Google Arts & Culture’s official Blob Opera page. That page explains the machine-learning system and its controls, but it does not promise that the Christmas playlist has returned.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Why the update stood out
Blob Opera’s holiday appeal came from participation rather than passive listening. The songs provided recognizable musical structure, while the blobs turned the performance into a playful vocal instrument. Users could improvise with pitch and vowels and hear the system build a harmonized opera-like arrangement in real time.
For that reason, the Christmas update was best understood as a festive remix of an existing interactive experiment—not as a new music service, a collection of full recorded performances or a permanent Google product.
Contemporary reporting from 9to5Google documented the holiday presentation, song list and its replacement by “Auld Lang Syne.”
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