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Since Java updates of January 2013, Java now displays a warning message when a Java application has to be executed.
Therefore, to access to the tuning fork, you need to validate the warning message which occurs at the page loading.

Online tuning fork features

Capability of generating any music note between C0 and B9 that corresponds approximately to frequencies from 16 Hz to 16000 Hz.
Allow to tune all musical instrument by ear.
To help musicians tune their instrument, many tunings are listed : guitar, 12 string guitar, bass guitar, 5 string bass guitar, 6 string bass guitar, 4 string banjo, 5 string banjo, mandolin, ukulele, violin, viola, cello, double bass.
Sounds generated by the tuning fork are all pure tones, which means they are composed of a single frequency (without harmonics).
The reference pitch A4 can be adjusted in the range of 438 Hz to 445 Hz.

Remarks :

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