BowlTune by BuddhaChime measures a singing bowl’s musical note, frequency in hertz (Hz), and cents deviation using your microphone or an audio recording. Try a single strike, continuous rim playing, or three comparable strikes. No app installation or account is required.
Tap Analyze, then strike or rim the bowl
Analyze your bowl to discover its traditional chakra association and resonance profile.
High-resolution logarithmic frequency analyzer
No resonances detected yet.
Save analyzed bowls to fill a complete 7-note chakra set. Empty slots show which notes you still need.
Chakra associations follow a common sound-healing convention and are not medical measurements.
Analyze a bowl, then save its result here.
These are equal-tempered reference values, not measurements of a particular bowl. A handmade bowl may fall between notes.
| Note | Reference frequency | How to read it |
|---|---|---|
| A3 | 220.00 Hz | One octave below A4 |
| C4 | 261.63 Hz | Middle C |
| A4 | 440.00 Hz | The selected reference note |
A singing bowl can produce several resonances. The strongest tone may be above the lowest detected resonance, and changing the mallet, strike point or rim technique can change which tone dominates. BowlTune keeps the main reading and lowest detected resonance separate.
When analysis resolves 220 Hz and 222 Hz, those are two modes with a 2 Hz difference. Their 221 Hz center is an average position, not a third measured resonance. The tuner identifies near-equal pairs as ambiguous rather than silently certifying one.
The analysis filters weak artifacts, looks for a continuous stable interval, and refines the selected frequency before holding the result. Quiet conditions, consistent playing and repeated measurements remain important.
Yes. The tuner is free to use in a compatible browser. No account or app download is required.
Yes, if your browser supports microphone access. Open the tuner in your phone’s browser, allow the microphone and place it about 30–50 cm from the bowl. You can also analyze a supported audio file.
Reduce voices, fans and traffic noise, keep the microphone position consistent, and wait for the bowl’s attack to settle. A changing note can reflect competing resonances. Use Avg ×3 to compare repeated strikes and retake unconfirmed results.
Strike captures a single hit for the selected time. Rim follows continuous playing until you stop it, with a 60-second maximum. Avg ×3 compares three separate accepted strikes; one imported recording is still one measurement.
No. The A4 reference changes how frequency is mapped to note names and cents; it does not alter the bowl’s sound. New measurements use the selected reference, while saved measurements retain their original reference.
No. BowlTune measures sound. It cannot change the bowl’s material, shape or pitch. Its readings can help you compare bowls or discuss a selected resonance with a maker.
The software has been tested with known tones, synthetic bowl signals, noise and split modes. Real-device error bounds have not yet been established. Displayed analysis resolution is not calibrated accuracy, and the tool should not be the sole basis for a tuning certificate.
Different tools can select different resonances or use different A4 references. Compare the same recording, octave, selected resonance and reference setting before judging a disagreement. Agreement with a particular commercial tuner is not guaranteed.
The tuner analyzes microphone and imported audio in your browser; it does not upload those recordings. Sharing a Sound Passport shares measurement values, not the audio. Download recordings before starting another capture if you want to keep them.
Yes. Open the Korean singing bowl tuner using the 한국어 link. It provides Korean instructions, interface labels and explanations of notes, frequency and cents.
BuddhaChime is a singing bowl workshop in Nepal. BowlTune helps players, teachers and bowl buyers record and compare sound. We distinguish measured acoustic values from traditional interpretations and disclose where device validation is still needed.
This link contains an editable measurement, not independent verification.