Key & BPM Finder

Key & BPM Finder estimates the dominant major or minor key and tempo from an audio recording. The table includes Camelot notation for harmonic mixing, energy and danceability readouts, plus source playback and CSV export. Energy is a level estimate and danceability a beat-regularity estimate; a mood or happiness score cannot be read from a waveform and is not reported.

Most reliable on tonal, commercially mixed music. Sparse, atonal or heavily percussive material gives the analyzer less harmonic information, and modal tracks can read as their relative major or minor.

Usually the relative major or minor of the same key signature - the same notes, read from a different root. Check whether the reported alternative fits your melody before overriding it.

Key & BPM Finder accepts browser-decodable audio up to 20 MB and 10 minutes per file. Select multiple files for sequential analysis; a complete arrangement usually gives more tonal context than a short fragment.

Because both are correct readings of the same pulse. Halftime genres are the usual cause - check which one matches how you would count it.

Harmonic mixing. Adjacent Camelot numbers share enough notes that two tracks can be played together without the keys clashing.

The Key & BPM Finder reports the dominant key across the file. For a song with a late modulation, analyze the sections separately if the ending matters to you.

Aimusicis does not currently issue a commercial-use license or certificate. Download access is separate from usage rights; review the current Terms and confirm you hold the rights to every uploaded or referenced source before publishing.

Play the source again to check the estimated tempo, then export the table as CSV. Analysis results stay in this browser tab and are not saved to My Music.

Key & BPM Finder runs in the browser and draws zero credits.

Beat Key Finder: upload a beat and get its musical key and BPM, so vocals, samples and MIDI parts are written in the right key the first time. Beat Finder: estimate BPM and key from uploaded recordings. Compare tempos, check half-time alternatives, preview the source and export an analysis table. BPM Tapper: find the tempo of any track by tapping along with your mouse, touch or the spacebar. No sign-in, no credits, no server round-trip. Metronome: set 30 to 300 BPM and a bar of two to seven beats, with an accented first click. It runs in your browser, with no sign-in and no credits. Random Key Generator: roll a root and one of seven modes, read the seven notes the key holds, and keep the chord path that fits. Reverb Calculator: enter a tempo, read every note length in milliseconds, then pick a pre-delay and a decay that fit the track. Frequency Generator: play a sine, square, triangle or sawtooth tone from 20 Hz to 20 kHz, with presets and the nearest note name. Audio Spectrum Analyzer: play an audio file and read 72 frequency bars from 20 Hz to 20 kHz, with the peak frequency, its level in dB and the nearest note. Chromatic Tuner: play or sing one note and read the nearest note name, its frequency in hertz and the deviation in cents, with a movable 440 Hz reference. Guitar Tuner: play a string and the page highlights the nearest of the six standard strings, reads the pitch in hertz and shows the deviation in cents. Vocal Range Test: sing your lowest then highest comfortable note and read your range as named notes, a semitone count and a span in octaves.