The Forever Jukebox

FAQ

What the what?

The Forever Jukebox is an open-source modernization of Paul Lamere's Infinite Jukebox and Autocanonizer — rebuilt from the ground up by Creighton Linza. It generates a forever-evolving version of any song.

How does it work?

The app uses the Spotify Web API for track search/metadata and YouTube as the audio source. The audio is processed by the Forever Jukebox Analysis Engine, which approximates Spotify’s legacy Echo Nest analysis (now deprecated) by extracting beats, segments, and related features. Those features drive beat-synchronous playback in the frontend. On each beat, the player may jump to a different, sonically similar point in the track based on timbre, loudness, segment duration, and beat position. The visualizations map these potential jump paths for every beat.

The full source code is available in the forever-jukebox repository.

How can I tune the Jukebox?

Click the Tune button to open the tuning panel.
Lower the threshold for higher audio continuity; raise it for more branches.
Adjust branch probability min/max and ramp speed to shape how often jumps happen.
Use the checkboxes to allow or restrict certain branch types.
Click a branch in the visualization, then press Delete to remove it.

What are the extra audio modes?

Extras can play the Jukebox normally, speed it up with Nightcore, slow and deepen it with Daycore, muffle and slow it with Vaporwave, add spatial panning with 8D Audio, bitcrush it with 8-Bit, add a filtered LoFi sound, submerge it with Underwater, or wash it through Cathedral reverb. More Cowbell and Swing are beat-aware remix toys inspired by Echo Nest Remix.

How do Favorites work?

Favorites are saved/unsaved by clicking the star icon on a track. They are stored locally in your browser and can optionally be synced across devices using a sync code obtained from the Favorites sync menu.
When you favorite a track, its tuning and deleted branches are saved too, so future loads restore your chosen parameters.
Use Reset in the Tune panel to restore default tuning and deleted branches (must be re-favorited to save changes).

Installable Offline App

For local/offline analysis and playback, open the Forever Jukebox Offline app and install it from your browser.

CACHED AUDIO

June 2026

A few more Audio Mode options introduced on the Extras menu: 8-bit, Underwater, Cathedral

May 2026

Added More Cowbell and Swing remix toys to Extras, giving beat-aware ways to reshape tracks while the Jukebox plays.
Offline App (PWA) can now export audio with any actively selected Audio Mode.
Implemented custom anchor branches: select a backward branch and press A to make it the forced anchor jump.
Added a sleep timer to the Tuning/Extras dialog.

April 2026

Added a What's New section (you are here)!
Added SoundCloud and Bandcamp support via Upload by URL.
Extras menu added (press E on the Listen screen or access in the tuning menu) for experimental features.
Added highly requested nightcore, daycore, & other Audio Mode options to the Extras menu.

March 2026

Branch stats toggle was added to provide helpful data points like direction, timing, & match percentage.
Bring It Home mode (press H on your keyboard to toggle) was added for a more linear playback option that finishes the track cleanly.
The backend moved to madmom-beats-lite, improving progress reporting and memory footprint, while maintaining quality analysis.

February 2026

The Offline App (PWA) launched, making it possible to analyze and play tracks directly - without an internet connection.
Recently Played and Trending discovery lists were added.
A new Arc visualization replaced the Spiral view.

January 2026

Happy new year! Site launched on the first of the year.
Favorites feature added, along with Favorites Sync so saved tracks can travel between sessions & devices.
Support was added for user uploads and manually added YouTube links.
Autocanonizer mode was added as a new playback option.