Audio Function Generator PRO9.3.0 - App Store

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.

. Try the MUSIC TONES PLAYBACK.

. Experiment with the huge FINE TUNE SELECTON, PRESETS SELECTION!

. 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!
AND THESE ARE THE ADVANCED SETTINGS/FEATURES:
=> Extending The Frequency Range (1Hz - 21kHz)
=> Extending The Sweep Times (0.1s - 600s)
=> 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 (custom phase shift of the generated signal)
=> BPM (Beats per Minute) Feature
=> Dual Function Generator
=> MultiTone Generator (playback of up to eight individual tones)
=> Background Theme Selection (Light/Dark)

Check out the new Tutorial page: www.ee-toolkit.com/audio-function-generator

Version History User interface improvements for the DualTone generator
Sequence Playback (MultiTone) UI optimisations
Dark Mode improvements 9.3.0 Sep 2 Smaller fixes and improvements 9.2.0 May 30 Fantastic news for all the Sweep fans! The new version of the App introduces an enhanced AudioEngine that supports advanced Sweep options. An additional menu has been added to the Sweep Tab for a combined Volume+Frequency Sweep combination.

All Sweep Features:
- Frequency Sweep
- low => high, high => low
- repeat mode, siren mode
- fixed or variable steps
- custom sweep time
- Volume Sweep
- set amplitude at start, set amplitude at stop
- repeat mode, siren mode
- custom sweep time
- Combined Frequency+Volume Sweep
- low => high, high => low
- set amplitude at start, set amplitude at stop
- repeat mode, siren mode
- fixed or variable steps
- custom sweep time

In addition the new AudioEngine now supports improved on/off frequency ramping and a better handling of gain changes (smoothing).

Other changes/improvements:
- issue with playback Stop Timer fixed
- catching corner cases when closing app and stopping playback (soft ramp down) 9.1.0 Feb 28 • Improvements when running the App on macOS / Apple Silicon
• Sweep improvements while repeat is active (frequency dependent volume ramping)
• added crossfading support for the balance setting 9.0.1 Jan 19 • This update introduces major enhancements to all the popovers across the app, with a refreshed design throughout the app that better aligns with the visual improvements introduced in iOS 26.
• All popovers received a major design overhaul, better readability, larger content and improved usability
• In addition to the updated UI, we’ve also included several smaller fixes and performance improvements to ensure the best App experience. 9.0.0 Jan 8 New in This Version:
• we've added a new balance control! Easily adjust the left/right stereo output for precise sound shaping.
• several improvements to musical notes playback 8.4.0 06/10/2025 • fixed an issue with the logarithmic sweep 8.3.1 05/09/2025 • Support for more languages
• Smaller fixes and UI improvements 8.3.0 05/07/2025 • History feature: easily track and manage your past actions with the new History feature. View a complete list of previously generated audio signals. No need to re-enter values. Quickly restore any past configuration with a single click. Stored records can be managed and deleted effortlessly.
• Burst Tab UI improvements and other UI improvements 8.2.0 02/02/2025 • fine tune for the burst generator (-/+)
• added reset button to the phase settings
• several UI improvements 8.1.0 11/13/2024 This update introduces a significant rewrite of the App's core functions, including an improved Audio Engine, enhanced power state management and many more core improvements.

In addition, the new version not only reintroduces the Tap-To-Save feature for all pages, but also greatly improves it. Users can now save and reload page configurations with a single tap.

A major update to the Noise Engine now also includes the option to apply custom Low-Pass or High-Pass filters to White Noise.

Additionally, various UI cleanups have been implemented. 8.0.0 09/21/2024 • Noise engine optimisations
• Minor fixes and improvements 7.5.0 05/10/2024 • BPM feature improvements
• update of the App screenshots 7.4.1 01/21/2024 Redesigned Fine-Tune popover!
• change the tone amplitude and the system volume independently
• change the volume in % or in dB
• custom configuration of the volume step size
• custom configuration of the frequency step size

New Remote Play option in the MultiTone tab!
• powerful new Remote Play menu with custom volume control.
• control all tone configurations from one tab.
• change the volume of each tone or configuration (volume steps are fully customizable).
• support for playing tones in a pre-defined sequence with configurable play time per tone (Sequence Setting).
• a reference tone can be set in addition.

Several user interface changes and improvements 7.4.0 01/09/2024 • MultiTone: logarithmic frequency slider support
• fix of the total sweep duration display (variable sweep) 7.3.4 12/12/2023 • Smaller fixes and improvements 7.3.3 11/25/2023 • BPM feature optimisations (adding fine-tuning and slider)
• Bugfixes and improvements 7.3.2 10/24/2023 • Better readability of the control elements in Dark Mode
• Smaller fixes and improvements 7.3.1 10/07/2023 • Audio Engine optimisations for all non-sine signals
• Improved visualisation of the phase view popover
• Variable sweep time calculation fix

MultiTone:
• Added new button for swapping the L/R channels of all tones
• Sequence Play now shows the title of a saved configuration when loading it 7.3.0 08/29/2023 • now supporting 3x16 frequency presets, all fully customisable. Use the arrow buttons to switch between them or just slide the controls.
• the settings button has been moved back to the bottom bar for all devices with larger screens.
• new setting to change the frequency sliders step size (0.01 – 100). 7.2.0 06/03/2023 Small UI fix (sweep tab) 7.1.1 03/22/2023 Support for controlling audio (Play/Pause) from the Control Center and iOS lock screen is now available again in an improved form.

Please note: to use this feature, the "Audio can mix with external sources" setting must be disabled. 7.1.0 03/14/2023 bugfixes and improvements 7.0.1 11/02/2022 Frequency Sweep
• Added new sweep option. You can now choose between fixed and variable frequency sweeps. A custom sweep step size (Hz) and a custom sweep step duration (s) can be freely selected. This gives you a whole new way to customize your frequency sweeps!

MultiTone
• Added menu to save and load sequences
• Added option to give a sequence a custom name and to rename it
• Fixing clicks in sequence play when going from one part to the other

General
• Fixed R+L signals going out of phase 7.0.0 09/15/2022 MultiTone bugfix: correctly loading the saved waveforms after moving to tab, App restart or loading from previously saved configuration 6.6.1 07/05/2022