Cadence test
Speak one rough bar over each plausible count. Shorten a phrase, move a pause, or choose the slower grid when the words keep fighting the pocket.
Free Tempo and Key Finder for Private Browser Analysis
This free tempo and key finder estimates BPM, musical key, and Camelot code for one file or a batch without uploading tracks or requiring an account.
Treat these readings as estimates and check them by ear, especially when a track changes tempo or key, has little percussion, or uses a dense mix.
Let this browser estimate the groove and key
Try MP3, WAV, FLAC, M4A, AAC, or OGG files · up to 100MB apiece
The audio stays on this device while your browser checks it
Drop it in, read the map, check it by ear.
A browser BPM detector should support three decisions: how to count the groove, whether the tonal estimate holds up, and what to try with those coordinates next.
- 01
Choose one local file or a small batch and keep everything in this browser tab. Analysis begins without an account or upload, making the first question private: what pulse and tonal home does the device hear?
- 02
Compare the main BPM with its half-time and double-time readings, then tap or speak a bar over each. Read the key, scale, Camelot code, and template match as a second hypothesis to challenge with the song itself.
- 03
Carry only the readings that survive your ears into the next session. Use them in a rap brief, DJ shortlist, DAW grid, or collaborator note, and rerun a clearer section when rhythm trackers or harmony cues disagree.
Put Your Tempo and Key Readings to Work
Treat the result as coordinates for an experiment, not a diagnosis. First count it, then test it with your body, and only then carry it into a writing or production session.
The main BPM, half-time, and double-time values describe related grids. The estimated key, mode, and Camelot code describe a harmonic neighborhood. Neither replaces listening through the actual track.
Try the coordinates in an AI rap songMelody test
Give the estimated key to the hook or bass experiment, then audition it against the source. Use the Camelot neighbor as another candidate rather than forcing a match that sounds wrong.
Ear check
When the numbers disagree, tap through a busier section and a clearer one or place each tempo on a DAW grid. Human checking matters most around live drift, breakdowns, and harmonic changes.
Session note
Record the BPM you actually felt, the tested key and mode, plus the Camelot code in the project note. That preserves the decision—not merely the detector's first output—for the next collaborator.
What the Tempo and Key Finder Returns
01
One groove viewed at three pulse rates
See the main BPM plus the slower and faster ways people might count the same groove, then tap along and choose the number that feels musical.
02
A tonic, mode, and match to question
TryRap shows tonic, major or minor mode, and match strength together. If the harmony is slippery, the result looks uncertain instead of pretending it heard perfectly.
03
A harmonic-shortlist code
The estimated key also gets a Camelot code, making it quicker to browse nearby DJ-mix options before checking the blend with your ears.
What BPM Means When a Rap Flow Feels Half-Time
BPM counts pulses in a minute, but your body may hear the groove at half or twice the displayed rate. Try all three readings against the song and keep the one that makes the bar structure feel natural.
How a Musical Key Acts as a Tonal Home
A key is the tonal home the music seems to lean toward, paired here with a major or minor scale. Some tracks refuse one clean answer, which is why TryRap shows match strength and asks you to check the suggestion by ear.
How Camelot Codes Shortlist Harmonic Transitions
The Camelot Wheel renames keys as memorable coordinates—8A, 8B, and their neighbors—so you can try likely DJ pairings without memorizing theory. It narrows the audition list; your ears still approve the actual transition.
How Browser Key Detection Forms Its Estimate
Everything happens in the browser with Essentia.js. Two RhythmExtractor2013 approaches listen for the beat in different ways, and the page turns their estimates into the displayed whole-number tempo. A separate KeyExtractor compares the song's pitch profile with EDMA templates to suggest a tonic and scale.
Let the estimate guide your next listen
Half-time and double-time are alternate ways to count one estimate. The key percentage only shows how closely the analyzed audio matched the chosen template. Treat both as listening prompts, especially when a song changes section, drifts, or uses detuned material.
What stays inside this browser tab
Your browser decodes the song and lets a worker in this tab inspect it. Nothing is uploaded, no account history is made, and the audio plus result disappear when you close or reload the page.
When Knowing a Song’s Key and Tempo Helps
Check a song’s key and BPM before making choices that depend on its tempo, tonality, or fit with other music.
Shape your rap flow around the pulse
Drop in the beat before writing and try your cadence against the measured pulse. Compare half-time and double-time when both counts seem musically plausible.
Shortlist a DJ transition with Camelot neighbors
Use the Camelot result as a quick shortlist for the next DJ transition, then trust the blend only after listening through sections that may shift or detune.
Give your remix or production an initial direction
Analyze a reference for coordinates, then try an original idea near that tempo or key without copying its melody, arrangement, or identity.
Scan several beats before choosing one to write on
Select several candidates together and scan the result cards when you are choosing which beat might fit a vocal, warm-up set, or writing session.
Before you trust the first BPM and key estimate
Can I check BPM and key without uploading the track?
No account or payment is required. The tempo and key finder decodes and analyzes audio locally in your browser, so the selected file and its result are not uploaded or stored by TryRap. The fixed Essentia.js engine may load from jsDelivr when it is not cached.
What do the three tempo readings and key percentage mean?
The main BPM is one plausible pulse count; half-time and double-time are alternate ways to feel the same groove. The key result includes tonic, major or minor mode, and a percentage that indicates template fit—not guaranteed accuracy.
How do I verify the detector before writing to the beat?
Tap through a busy and a sparse section, then speak one bar over the pulse. Steady drums and clear harmony are easier to estimate. Live drift, detuning, quiet percussion, dense layers, or section changes are reasons to test another reading by ear.
What experiment is a Camelot code useful for?
The estimated key and scale are translated into a Camelot coordinate that narrows the list of likely neighboring keys for a DJ transition. It is a shortlist, not approval: audition the real blend because key changes, detuned samples, and arrangement context can still clash.
Which files are practical for in-browser BPM analysis?
Choose MP3, WAV, FLAC, M4A, AAC, or OGG files up to 100MB each. Browser codec support still matters, so uncommon encodings may fail despite a familiar extension. A large file expands in memory after decoding and may need a shorter or lower-sample-rate copy.
Can I compare tempo and key across several tracks at once?
Yes. TryRap processes a selected batch one file at a time to control browser memory. Keep the tab open for large tracks, compare the result cards, and treat each output as a listening hypothesis rather than a permanent analysis record.