/ 01 — Tools

Free in-browser tools.
Drop a file, get an answer.

Small utilities built from the same DSP that powers Sample Vault. The library already has the sound — these help you find it, hear it, and take it with you. Nothing uploaded. No account.

/ 01 — Analyze

Analyze.

The recall layer. 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.

Fig. 01 / Key detector

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 — the file never leaves your machine.

  • —WAV, AIFF, MP3, FLAC, OGG
  • —Chromagram + top matches
  • —No upload, no sign-up
Open tool
Fig. 02 / BPM detector

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. Onset detection plus autocorrelation, run locally in the browser.

  • —WAV, AIFF, MP3, FLAC, OGG
  • —Tempo · confidence · loop check
  • —No upload, no sign-up
Open tool
Fig. 03 / Spectrogram viewer

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
Open tool
Fig. 04 / Mono compatibility

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
Open tool
Fig. 05 / Duplicate sample finder

Duplicate sample finder.

Drop a folder of samples. Find exact and near-identical duplicates by perceptual hash, then quarantine the redundant copies — auto-clean in Chromium, cleanup script or coding-agent prompt everywhere else. Files never leave your machine.

  • —WAV, AIFF, MP3, FLAC, OGG, M4A, AAC
  • —Exact + near-identical clustering
  • —Quarantine, never delete
Open tool
Fig. 06 / The library audit

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
Open tool

/ 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.

Fig. 07 / Pitch shifter

Pitch shifter.

Drop any audio file. Transpose by ±12 semitones with the tempo unchanged, preview both versions, and download the result as WAV. STFT phase-vocoded, runs locally in the browser.

  • —WAV, MP3, FLAC, OGG, M4A, AAC
  • —±12 semitones · tempo preserved
  • —No upload, no sign-up
Open tool
Fig. 08 / Time stretcher & BPM changer

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
Open tool
Fig. 09 / Audio reverser

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
Open tool
Fig. 10 / Volume booster

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
Open tool

/ 03 — Utilities

Utilities.

Small helpers for the parts of the session that aren't a file — mixing keys, counting a tempo by hand.

Fig. 11 / Camelot wheel

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
Open tool
Fig. 12 / Tap tempo

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
Open tool