How it works
The tuner uses the McLeod Pitch Method (MPM) via pitchfinder to estimate the fundamental frequency of what you play, then converts it to a note name and cents-off value. The same algorithm trusted by orchestra tuners.
Practice Room · Tuner & Metronome
Tuner and metronome, together.
Tune up, then set your tempo — both tools live here, so you can move from one to the other without leaving the page.
Tuner
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Metronome
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About the tuner
Privacy guarantee
The microphone is requested only when you tap Start. Audio is analysed locally — no upload, no server, no recording. The promise is enforced by the code, not the policy.
About reference pitch
Default A4 = 440 Hz, the modern standard. Many orchestras tune to A4 = 442 Hz for a slightly brighter sound. Use the A4 selector in the tuner if your group tunes higher.
About the metronome
Tap your tempo
Don't know what BPM you want? Tap the T key (or the Tap tempo button) in time with the music — Corona Strings averages your taps and sets the metronome.
Visual + audible
Beat dots light up Rosin Amber on the downbeat and softer on off-beats — useful when you're practicing in a quiet room or with headphones.
Why it matters
The metronome reveals what tempo you can actually play cleanly — where you rush, where you drag, where bow distribution breaks down. Start 8–10 BPM under tempo; when it's clean three times in a row, raise it 2 BPM and repeat.
Tune first, then keep time
A good practice session starts in tune. Play a single sustained note, bow steadily, and let the tuner settle before you trust the reading — it’s most accurate above mezzo-piano, where long notes give the algorithm more to work with. Then set the metronome and run your slow-practice loop. The two tools are here together for exactly this reason.