/ 01 — Tools
Free in-browser tools.
Drop a file, get an answer.
Small utilities built on the same analysis engine that powers Sample Vault. The library already has the sound. These help you find it, hear it, and take it with you. When you want to search the whole library, search the sounds you already own. Nothing uploaded. No account.
/ 01 — Analyze
Analyze.
Every tool here reads a property you'd search your library by: key, tempo, spectrum, frequency balance. The same measurements the desktop app runs across every file you own.
Key & scale detector.
Drop any audio file. Get the key, a chromagram of tonal content, and the top matching scales ranked by confidence. Runs entirely in the browser, so the file never leaves your machine.
- —WAV, AIFF, MP3, FLAC, OGG
- —Chromagram + top matches
- —No upload, no sign-up
BPM detector.
Drop a loop, a one-shot, or a full track. Get the BPM, detection confidence, and a read on whether the file is a loop. It listens for the hits and measures the spacing between them, right in the browser.
- —WAV, AIFF, MP3, FLAC, OGG
- —Tempo · confidence · loop check
- —No upload, no sign-up
Spectrogram viewer.
Drop any audio file. See its frequency spectrum over time on a log-frequency axis, zoom and pan through the timeline, and export the spectrogram as a PNG. Brightness and band balance read out alongside.
- —WAV, MP3, FLAC, OGG, M4A, AAC
- —Log-frequency · zoom · PNG export
- —No upload, no sign-up
Mono-compatibility checker.
Drop a stereo file. See per-band phase incompatibility (sub-bass, bass, low-mids, mids, highs) and find out which frequencies will collapse when summed to mono on a club PA, phone speaker, or vinyl pressing.
- —WAV, AIFF, MP3, FLAC, OGG
- —5-band phase analysis · overall verdict
- —No upload, no sign-up
Duplicate sample finder.
Drop a folder of samples. Find exact and near-identical duplicates by how they sound, so renamed copies still match, then quarantine the redundant ones. Files never leave your machine.
- —WAV, AIFF, MP3, FLAC, OGG, M4A, AAC
- —Exact + near-identical clustering
- —Quarantine, never delete
The library audit.
Six numbers in. The honest report on how much of your sample library you actually use, what your graveyard looks like, and what your unused samples cost. Estimates only — runs in your browser.
- —Six inputs, ~60 seconds
- —Awareness ratio · graveyard · cost per used sample
- —No upload, no sign-up
/ 02 — Convert
Convert.
Change a file and take the result with you. Every converter previews before you commit, and downloads a clean WAV. Nothing uploaded.
Pitch shifter.
Drop any audio file. Transpose by ±12 semitones with the tempo unchanged, preview both versions, and download the result as WAV. The shift keeps timing intact and runs locally in the browser.
- —WAV, MP3, FLAC, OGG, M4A, AAC
- —±12 semitones · tempo preserved
- —No upload, no sign-up
Time stretcher & BPM changer.
Drop any audio file. Source BPM auto-detected from the filename or by analysing the audio. Set the target BPM (or pull the rate slider directly), preview, and download as WAV. Pitch unchanged.
- —WAV, MP3, FLAC, OGG, M4A, AAC
- —BPM auto-detect · pitch preserved
- —No upload, no sign-up
Audio reverser.
Drop any audio file. Hear it backwards instantly, then download the reversed version as WAV. Sample-exact reversal: duration, sample rate, and channels unchanged. Works on voice recordings, songs, and samples.
- —WAV, MP3, FLAC, OGG, M4A, AAC
- —Voice · songs · samples · exact length
- —No upload, no sign-up
Volume booster.
Drop any audio file. Raise the level by up to +18 dB while a soft limiter holds the peaks at −0.3 dBFS, preview original against boosted, and download as WAV. Runs locally in the browser.
- —WAV, MP3, FLAC, OGG, M4A, AAC
- —Up to +18 dB · limiter at −0.3 dBFS
- —No upload, no sign-up
/ 03 — Utilities
Utilities.
Small helpers for the parts of the session that aren't a file: mixing keys, counting a tempo by hand.
Camelot wheel converter.
Drop a track or click a position on the Camelot wheel. See the matching key, three harmonically-compatible neighbours, and step around the wheel for clean transitions. Same key detection, mapped to the system DJs already think in.
- —24 keys · 12 wheel positions
- —Energy boost · drop · mood swap
- —No upload, no sign-up
Tap tempo.
No file, no mic. Tap the spacebar, any key, or the pad in time with the music: the BPM appears after four taps and settles over twelve, with a steadiness readout and half / double time.
- —Spacebar · any key · click
- —One-decimal BPM · ±ms jitter
- —No upload, no sign-up
/ 04 — How these tools work
Every tool on this page runs entirely in your browser. The file is decoded and analysed on your machine, and nothing is sent anywhere, which is also why they work on a plane. The engine behind them is the same one the Sample Vault desktop app uses to analyse whole libraries: it listens to the audio frame by frame and measures what's actually there, instead of guessing from a filename.
One design decision runs through all of them: they'd rather admit defeat than guess. Drop an ambient pad with no clear pulse into the BPM detector and it says so instead of inventing a number. The key detector shows its confidence, so you know when to trust it and when to double-check by ear. If you want the longer version of that check, the guide to finding a song's key covers what detection can and can't do.
If you run a blog, a course, or a forum, the BPM detector is embeddable: copy the snippet from its page and your readers get the tool without leaving yours. And when one file at a time stops being enough, the desktop app runs this same analysis across everything you own, for free. The tools answer a question about one file. The app answers it about all of them.