Bandcamp gives you a play button and a stopwatch. Crate adds a waveform, a tempo and a key — so you can tell in two seconds whether a track is worth your money. Arrows skip and seek, space pauses, without leaving the page.
One-time €4.99 · 76 KB · Chrome 116+ · nothing leaves your machine
Really playing: Subsurface — analysed by the exact code that ships in the extension.
Same panel, real Bandcamp — unedited
One strip pinned to the bottom of the window. It stays through scrolling and page changes.
Bass, mids and highs, drawn the way a CDJ draws them. Intros, breakdowns and drops read as shapes.
BPM and the Camelot code, right next to the waveform. An uncertain key is marked with a question mark instead of pretending to be sure.
Click to seek, arrows to skip, space to pause. The strip turns amber for the last thirty seconds.
Follow a link to another release and the track carries on. The player lives in the extension, not the page.
Tracks are analysed only when you play them.
Different envelope timings per band — a hi-hat stays a spike, a bassline stays a mass.
Lines follow the detected tempo, every eighth bar brighter — the way DJs count.
The waveform starts drawing in about a second and a half; the full analysis lands in three.
Chrome only installs from its own store, so this one loads as a folder. Takes about a minute.
Unpack the archive somewhere permanent — Chrome loads the extension from that folder.
Open chrome://extensions and turn on Developer mode
in the top right corner.
Click Load unpacked and pick the unpacked crate folder.
Open any album on Bandcamp. The strip appears at the bottom of the window.
Chrome shows a “Disable developer mode extensions” banner on every start — dismiss it, the extension keeps working. That's Chrome's rule for anything outside its store.
No. There is no server — audio is analysed in your browser and the results stay there.
It reads the same preview stream Bandcamp's own player uses, holds it in memory long enough to draw the waveform, and drops it.
Yes — tag pages, feeds and discovery too. Anywhere music plays on Bandcamp, the strip comes up.
Tempo is reliable on four-to-the-floor and can land on half or double time on odd rhythms. When the key is a guess, Crate shows a question mark instead of a confident wrong answer.
It's early — shared with a handful of people first. The store review is worth having once it has proven itself on real digging sessions.
Reload the extension on chrome://extensions, then reload
the Bandcamp tab. If it happens again, tell me which page — that
helps.