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Audio Signal Generator including Sweeps & Noise

By Thomas Gruber

This app is only available on the App Store for iOS devices.


This is the highly recommended and praised Function Generator App - an amazingly great and powerful tone generator. Enriched with a vast amount of features yet it is extremely intuitive and designed for simplicity.

Get to know this great App now. It is very well maintained and has received considerable upgrades over the past years.

So, … what can you do with this App?

• PLAY TEST TONES Sine, Rectangular, Triangular and Sawtooth.

• PLAY FREQUENCY SWEEP TEST TONES in both directions (minimum to maximum frequency and maximum to minimum frequency).

• PLAY VOLUME SWEEPS (from minimum to maximum volume).

• Try the SWEEP REPEAT / WOBBLE function.



• Or create your own CUSTOM PRESETS!

• And SAVE an endless amount of CONFIGURATIONS (Frequency, Sweep, Noise) for later quick access and direct playback function.

• Even play back different kinds of NOISE – White, Pink, Violet, Grey, Brown, Blue is also supported.

The Function Generator is AMAZINGLY INTUITIVE and SIMPLE!

=> Extending The Frequency Range
=> Extending The Sweep Times
=> Changing Min/Max Slider Frequency Ranges
=> Changing Max Sweep Time Slider Range
=> Changing Signal Amplitude
=> Enabling Of The Sweep Repeat / Wobble Function
=> Frequency Slider Setting to Linear or Logarithmic
=> Left/Right Channel Individual Selection
=> Permanently Saving Custom Presets
=> Saving Of Endless Number Of Audio Configurations
=> Phase Out Setting (Phase shift of 180° of the generated signal)
=> BPM (Beats per Minute) Feature
=> Dual Function Generator
=> Background Theme Selection (Light/Dark)

What's New in Version 4.0.1

- fixed ramp-up issue when starting playback.

This was done for the last big release:
• New Multi Tone Generator Tab. Now all the great features from the MultiTone App have been added to the Function Generator. Create and play up to 8 completely individual tone combinations in parallel.
• New Timed Playback feature: set a completely customizable timer (hours:minuts:seconds) for exact timing of your playback. Whenever active, playback will stop after the timer has counted down to zero.
• Added Siren Mode for Sweep Repeat setting.
• Change waveforms on the fly: now playback continues even if you change the waveform type while playback is already active.
• Check if Mono Audio is enabled on your iDevice.
• Fixed minor issue for sweep repeat in logarithmic mode.

Thank you very much for using the Function Generator! If you have a moment, please leave a review in the App Store. With this, you are really helping a lot so we can further develop and improve the App. Thank you so much!


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Customer Reviews

Best frequency app I have found

I use 440 all the time and I like combining it with 73 and the different background noises. I use your app to study and to sleep.

Feature request: I would like to identify a few to many different frequencies and play them in order backwards and or forwards or loop and set the length of time to hear each sound. This could be great for practicing scales though this wasn't my original intention. 😊

Excellent Frequency And Noise Generator

I have been working in professional audio for 30 years. I tune rooms and speaker placement, set up EQs, tune subwoofer boxes, find panel resonances, etc. This handy app has all the features I could ever need, they are really usable, and they are geared toward the pro audio user. I tried 3 other frequency generator apps and this is superior by far. Free version is fine, but for $1.99 just go full. Thanks!

Excellent. Previous rating was a mistake

Sorry, I wrote the bad review on this one based on my experience with a different generator. My son and used this one to drive an amp for a homemade Chladni plate and it was awesome how it was able to move up through the frequencies. Son got an A on the project and was asked several times to repeat the experiment for others at school. Sorry again. Good job on the app.

Audio Signal Generator including Sweeps & Noise
View in iTunes
This app is designed for both iPhone and iPad
  • Free
  • Category: Utilities
  • Updated:
  • Version: 4.0.1
  • Size: 18.9 MB
  • Languages: English, German
  • Seller:

Compatibility: Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.

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