Musicians and Sound Engineers. Musical Notes and Frequencies and Wavelengths.

Now there's an app from dgApps to convert between them all.

The app features a sliding fader to dynamically change frequency, wavelength and musical note, with locks to step through standard third octave frequencies or whole musical notes.

There's a built in oscillator so you can hear the frequency, and a frequency tracker so the app can tell you the frequency. Both the oscillator and the frequency tracker display the audio waveform.

A settings section allows for different tuning standards, and variations in the speed of sound. Lambda can also receive calculated Speed of Sound in Air values from another dgApps app, Cair. Lambda is now a universal app, equally at home on an iPhone as on an iPad. In Split Mode on an iPad device, side by side with Cair, the calculated Speed of Sound in Air is passed in real time to the Lambda app..

Lambda allows you to share frequency/wavelength/note data via all the usual sharing methods.

What’s New

Version 2.0.1

This app has been updated by Apple to use the latest Apple signing certificate.

Better handling of the Speed of Sound in Air notifications from the Cair app.
Bug fixes.

Ratings and Reviews

5.0 out of 5
1 Rating

1 Rating

Support the bus ,

Great Job!

This app does exactly what was looking for and it looks minimalistic, the white on black makes it look sleek and not too bright for when I'm working on music late at night. Perfect for me :)

App Privacy

The developer, dgApps, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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