Know if it fits
before you
chop it.
You're mid-session. You need a sample that fits. Play anything — vinyl, a streaming track, a recording — and Riftly tells you the key and BPM instantly. Real sampling, from anywhere.
Free during open beta · Full version · Mac & Windows
Built for producers who sample
From the record
to your track.
Detect
Key, BPM and Camelot from any audio — each with a confidence score. Drop a file, record an input, or read it live.
Monitor live
Hit Start Live and key + tempo update continuously as audio plays. Capture system audio straight from your Mac — no cables.
Find the fit
Perfect / Workable / Avoid ratings surface the samples in your own library that sit right with your current key and BPM.
Your crate
A turntable-style browser of your scanned folders, with instant 10-second previews and reveal-in-Finder.
Features
The data the crate
never came with.
Drop it into your session. It listens. You keep digging.
Key & BPM detection
Identifies the musical key using the Albrecht-Shanahan tonal-profile method, with a genre-aware tempo prior tuned for slow soul, funk and jazz. Every result carries a confidence readout, shown in standard notation and Camelot code.
Live monitoring
Start Live detects key and tempo continuously from any input as audio plays. On Mac, capture system audio directly — analyse a track from your browser or DAW with no routing cables.
Record, drop & analyse
Capture from any input, or drag-and-drop an audio file to analyse it. Play it back on a scrubbable waveform, tap tempo by hand, and review the key/BPM of every session.
Harmonic compatibility
Camelot-wheel mapping plus Perfect / Workable / Avoid ratings tell you instantly whether two samples fit. A harmonic map lays out your library by key relationship.
Private sample library
Scan multiple folders into a private, encrypted library. Files are hash-keyed so metadata survives renaming or moving — and your files are never renamed or tagged. Search by key, BPM or name.
MIDI, export & search
Transcribe the detected notes of a sample to a MIDI file, and export your audio as WAV or MIDI. One click searches the current key/BPM out to streaming and sample-credit sources for more material.
What producers say
Early feedback.
This is absolutely amazing. I know so many people would definitely be interested in this once it's live. Really impressive work — I appreciate you building this and letting me try it.
Beta tester
Melbourne producer
Honestly, this is one of the better key finders I've seen. It's usually within a note or two. The sampler is great, everything checks out. I can see a lot of people enjoying this.
Beta tester
Hip-hop beatmaker
The open beta is live
Get in
early.
Make a free account and the full version is yours for the whole beta — no card, no catch. Help shape where it goes.
Free during open beta · Mac & Windows