Free tools for mixing, mastering and beatmaking
Measure a master's loudness, find a track's key and tempo, work out delay times and read the frequency map. Every tool runs in your browser and costs nothing. Only the written critiques in Referee and Blueprint ask you to sign in, and they come with any paid Vitric license.
Free to use. Your audio never leaves your computer.
Loudness Meter
Integrated LUFS, short-term and momentary maximums, loudness range and true peak, with what each streaming service says it does to a track at that level.
Key and BPM Finder
The musical key with a confidence value, its relative key and Camelot code, the tempo with half-time and double-time readings, and the tuning reference.
BPM Tapper
Tap along to any song to find its tempo, with half-time and double-time readings and one-click copy. Works with a mouse, a key or a phone screen.
Delay Calculator
Tap or type a tempo and read every note value from a whole note to a 1/64, straight, dotted and triplet, in milliseconds and hertz, plus reverb starting points.
Reverb Calculator
Choose a tempo, pre-delay division and tail length. Copy a matched pre-delay and decay in milliseconds or seconds, with room, plate and hall starting points.
Slowed + Reverb
Slow a song down and add a wash of reverb rendered from Halo Reverb, then download a WAV. Everything happens in your browser; nothing is uploaded.
EQ Frequency Chart
Where instruments sit from 20 Hz to 20 kHz, the bands engineers name (mud, honk, harshness, air), and a note to frequency converter for tuning 808s.
Referee
Measures a mix's loudness, spectral balance, width and dynamics against a genre target or a reference track, then writes a prioritized list of changes to try.
Blueprint
Maps a bounce's sections and energy curve on a bar grid, compares the arrangement with a genre target or a reference, and suggests changes in bar counts.
How the tools work
The same care goes into these tools as into the plugins: the DSP is tested against published reference signals, and every outside figure links to where it comes from.
Your audio stays with you
Files are decoded and analyzed inside the browser tab, in a background worker on your own computer. The Loudness Meter and the Key and BPM Finder send nothing anywhere, and keep working without a connection once the page has loaded. Referee and Blueprint send only the measured numbers to write their notes, never the audio.
Checked against the standards
The loudness meter implements ITU-R BS.1770-4 and is tested against EBU Tech 3341 and 3342 style reference signals. The key finder is tested on chords and progressions in all 24 keys, tuned flat and sharp, with noise and drums.
No invented numbers
Streaming loudness figures come only from each service's own documentation, with the link and the date it was checked. Where a service publishes nothing, the loudness meter says so.
Plain links
Share a tool in a forum, a class or a mix note. Click a link to copy it.
- Loudness Meter
- Key and BPM Finder
- BPM Tapper
- Delay Calculator
- Reverb Calculator
- Slowed + Reverb
- EQ Frequency Chart
- Referee
- Blueprint