Tuning Fork A440 - Diapason

Diapason Plus is a simple and reliable tuning fork app designed for musicians, choir conductors, music teachers, and music enthusiasts.

Get quick and accurate access to the most commonly used reference frequencies — 440 Hz, 432 Hz, and 415 Hz — or choose a custom frequency to suit your needs.

SIMPLE, FAST AND PRECISE

Whether you're tuning an instrument, setting the pitch for a choir, teaching a music lesson, or rehearsing, Diapason Plus gives you an immediate and stable reference tone.

• Easy to use: select a preset frequency with a tap or choose your own custom value. • Quick access: play your reference tone instantly, without unnecessary steps. • Precise reference tones: designed for musicians, teachers, conductors, and enthusiasts. • Clean interface: a minimal design that keeps the focus on your music.

REFERENCE FREQUENCIES

440 Hz — The standard A

The internationally recognized reference pitch for modern instrument tuning. A reliable choice for rehearsals, performances, lessons, and everyday practice.

432 Hz — An alternative tuning

Some musicians choose 432 Hz as an alternative to the standard 440 Hz, appreciating its slightly lower pitch and different tonal character.

415 Hz — The baroque choice

Approximately a semitone below 440 Hz, 415 Hz is commonly used in historically informed performances of baroque and early music. It is particularly useful when working with period instruments and ensembles.

CUSTOM FREQUENCY

Need a different reference pitch? Diapason Plus lets you select a custom frequency within the available range, giving you greater flexibility for different instruments and musical contexts.

EXTRA FEATURES

• Shake to Play: shake your device to start the tuning fork instantly, without pressing a button. Availability depends on your device's motion sensors. • Keep Screen On: prevent the display from turning off while you're using the app. • Tap to Stop: tap the tuning fork while it's playing to stop the sound immediately.

YOUR REFERENCE TONE, ALWAYS AT HAND

From everyday instrument tuning to choir rehearsals, music lessons, baroque performances, and personal practice, Diapason Plus gives you a simple and convenient reference tone whenever you need it.

Choose your frequency, play the tone, and focus on your music.

Note: Sound reproduction and the effective frequency range may vary depending on the audio hardware and capabilities of your device.