Instrument Tuner On-device
Live pitch detection from your microphone — oud first, then guitar, ukulele, violin and bass.
An explicit tap is required before the microphone can be read. This screen is that tap — decline it and you can still browse every string's target frequency below.
Strings in this tuning
| String | Note | Hz |
|---|---|---|
| Course 1 (bass) | C2 | 65.41 |
| Course 2 | F2 | 87.31 |
| Course 3 | A2 | 110.00 |
| Course 4 | D3 | 146.83 |
| Course 5 | G3 | 196.00 |
| Course 6 (highest) | C4 | 261.63 |
The oud has strong regional and per-player tuning variation. This C-to-C tuning is named the "most common" tuning by two independent oud-specific teaching sources; a "High F" variant (F2 A2 D3 G3 C4 F4) is also widely used.
A phone microphone and this audio stack are not a lab instrument. Accuracy depends on your microphone and background noise — treat this as a helpful guide, not a calibrated tuner.
Audio is analysed on your device only. Nothing is uploaded, recorded or saved.
Tune an oud, guitar, ukulele, violin or bass by ear using your microphone. Pick a tuning, see every string's target note and frequency, and read the live cents deviation as you play. Detection runs entirely on your device — nothing is uploaded or recorded.
About this tool
What you provide
- Microphone access, granted with an explicit tap — never requested automatically.
- A tuning: Arabic oud, Turkish oud, guitar (standard or drop D), ukulele, violin or bass, each with sourced string frequencies.
- Optionally a reference A between 400 and 480 Hz, in place of the default 440 Hz.
What you get
- A live detected note, octave and cents deviation, updated as you play.
- The nearest configured string and how far off it is, in cents.
- A reference table of every string's target note and frequency for the chosen tuning, visible even without microphone access.
Limits
- Accuracy depends on your microphone and the surrounding noise — this is a helpful guide, not a calibrated instrument.
- Detection needs a clean, sustained note; background noise or a ringing neighbouring string can throw off a reading.
- All processing happens on your device from the live microphone signal — nothing is uploaded, recorded or saved.
How to use it
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Pick a tuning
Choose your instrument's tuning from the list — Arabic oud is first, followed by Turkish oud, guitar, ukulele, violin and bass. Every string's target note and frequency appears below it right away.
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Tap Start listening
Tap Start listening and allow microphone access when your device asks — that tap is required before the microphone can be read. If you decline it, you can still browse the tuning table.
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Play a string
Pluck or bow one string at a time. The meter shows the note it detected, how many cents sharp or flat it is, and which configured string it's closest to.
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Tune toward the centre
Tighten or loosen the string until the needle sits in the middle and the cents reading is close to zero — that's in tune for the reference A you set.
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Adjust the reference A if needed
If you tune to a reference other than 440 Hz, type it into the Reference A field — every note name and cents reading updates to match it immediately.
Frequently asked questions
How accurate is the tuner?
The pitch maths is exact, but the reading is only as good as your phone's microphone and the room around it. Background noise, a cheap microphone or a noisy fan can all shift or block a reading — treat it as a helpful guide, not a calibrated instrument.
Why does it show a different note than I expect?
The detector reports whatever fundamental frequency it hears, tempered to the nearest semitone at your reference A. If a neighbouring string, a buzz or background noise is louder than the note you played, it can get picked up instead — pluck cleanly and let the other strings stop ringing first.
Does it work without a connection?
Yes. Pitch detection runs entirely on your device using the microphone signal — nothing is uploaded, recorded or sent anywhere.
Can I use a different tuning reference than A440?
Yes. The reference A field accepts any value roughly between 400 and 480 Hz, and every note and cents reading follows it.