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Audio Function Generator PRO

Audio Function Generator PRO

Frequency and Signal Generator

270 ratings
58 reviews
#131 in paid Music
🔧 Utilities
🎵 Music
$9.99

Lowest price: $4.99 4 years ago (-100%)

Price history

Details

Released
July 15, 2014
Updated
October 17, 2026

Features

Developer

Thomas Gruber
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Audio Function Generator PRO screenshot #1 for iPhone
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Audio Function Generator PRO screenshot #5 for iPhone
Audio Function Generator PRO screenshot #6 for iPhone
Audio Function Generator PRO screenshot #7 for iPhone
Audio Function Generator PRO screenshot #8 for iPhone
Audio Function Generator PRO screenshot #9 for iPhone
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About

Generate various audio test tones, including sine, square, and sawtooth waves. Explore frequency and volume sweeps, custom presets, and different types of noise. Advanced settings allow for fine-tuning signal parameters and creating complex multi-tone sequences.

✓Generate sine, square, triangular, and sawtooth tones
✓Frequency and volume sweep generation
✓Customizable presets and configurations
✓Multiple noise types (White, Pink, Violet, etc.)
✓Advanced signal parameter control
✓Multi-tone and dual function generation
Show original description

What users say about Audio Function Generator PRO

Reviews of Audio Function Generator PRO are mostly positive: the Music app is rated 4.8/5 from 270 App Store ratings. What users like most: superb craftsmanship and work, excellent performance on older devices. Top complaints: linear sweep is useless, missing PWM functionality. Summarized from real user reviews.

Positive things

  • ✨Superb craftsmanship and work
  • 🚀Excellent performance on older devices
  • 💡History feature is a great addition
  • 👍Versatile and powerful app
  • 🎶Great for binaural beats and sound creation
  • 🔧Customizable presets and modulation
  • 🎧Useful for tinnitus relief
  • 🔊Great for audio testing and tuning
  • 💡Elegant and sophisticated interface
  • 💰Best value for money
  • 🛠️Excellent support
  • 🎛️Detailed sound wave control
  • 🎯Accurate and easy to use
  • 🔊Good for speaker testing
  • 🎶Useful for sleep entrainment
  • 🎹Perfect for speaker building
  • 💡Well-thought-out and implemented
  • 💯Top frequency generator
  • ✅All functions present
  • 🎚️Bargain price, highly recommended
  • 🎶Excellent for piano tuning
  • 👂Useful for hearing checks
  • 🔬Great for electronics lab
  • 💾Parameter saving is great
  • 🚀Sweep function is great
  • ⚙️Practical tool, not overwhelmed with graphics
  • 🔊Accurate and functional
  • 🎵Easy to use, perfect for speakers
  • 🌟Best in class
  • 🚀Excellent application
  • 💡Electronic tuning fork
  • ✅Good multiple use app
  • 👍Great as a function generator in the electronics lab
  • 💯Excellent tone generator
  • ✨Super top
  • 👍Great app
  • 🚀Great app
  • 🎶Great app
  • 👍Great app

Negative things

  • 📉Linear sweep is useless
  • ❓Missing PWM functionality
  • ❓Missing Terzrauschen (third-octave noise)
  • 🐛Volume button issues
  • 🐛GUI is bad
  • 🐛Buttons don't respond
  • 🐛Settings don't keep
  • 🐛Frequencies stick
  • 🐛App stops too much
  • 📉Frequency range not enough
  • 🐛Update crashes on iPad Air2
  • 🐛App opens AppStore repeatedly after purchase
See all reviews
+1

What's New in Audio Function Generator PRO

9.4.0

October 17, 2026

• support for iPhone Duo • added a Scale Trainer feature (Musical Notes popover), which plays a series of notes in a loop. You pick a key and scale or enter your own notes, and set the octave, tempo (BPM), beats per note, a pattern and repeat. • added support for the Playback Start Timer and Playback Stop Timer to the MultiTone main view • Extended Sweep View optimisations for smaller screens (Volume, Frequency+Volume)

More

Charts

Top Paid

📉 131-11

Music

This app dropped -11 positions in Music chart.

Last updated on October 22, 2026.

User reviews

Most RecentHighest RatedLowest Rated

a true masterpiece

[Update] __ A great App just got a little better !
The History feature is icing on the cake.
.
.
I tried the free version, and within minutes purchased PRO … This App is a superb piece of work and works beautifully on my ageing 9.7” iPad Pro. Many thanks to the developer for his craftsmanship!
PPortaDisk

Engineer

Continues to become greater
MRMany apps, a few reviews

Pro

5/5
JJ0hn3410

a true masterpiece

I tried the free version, and within minutes purchased PRO … This App is a superb piece of work and works beautifully on my ageing 9.7” iPad Pro. Many thanks to the developer for his craftsmanship!
PPortaDisk

Good app!!

Good app
FFlashgordo1
See 53 more reviews

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User experience

🐞

Reported Bugs

6 issues

Volume button issues (jumps up and down, displays wrong level)

Bug

Update crashes on iPad Air2 when changing screens

Bug

App opens AppStore repeatedly after purchase

Bug

Buttons don't respond, settings don't keep

Bug

Frequencies stick, program is useless

Bug

App stops too much

Bug
✨

Requested Features

19 requests

Logarithmic sweeps and frequency slider scale

Feature

PWM functionality

Feature

Terzrauschen (third-octave noise)

Feature

Ping-pong sweeps in Multitone windows

Feature

Sweeping of noise/adding noise in Multitone sweep with sweeping bandpass filter

Feature

Audio plugin (AU, AAX, VST)

Feature

Responsiveness for MacBook use

Feature

Simultaneous recording of generated signals

Feature

Panning function for tones and sweeps

Feature

Ability to save Multitone configurations

Feature

Phase shift functionality

Feature

Higher frequency range (up to 24kHz)

Feature

Dual mode sweep function

Feature

Taper function

Feature

Extended time for sweeps (6-8 hours)

Feature

Ability to stay at selected frequency for several minutes

Feature

Spectrum analyzer

Feature

Separate control for left and right channels

Feature

8-hour program for sleep entrainment

Feature

FAQ

What does the Audio Function Generator PRO app do?

This app functions as a powerful tone and signal generator. It allows users to create and play various audio test tones like sine, rectangular, triangular, and sawtooth waves. You can also generate frequency and volume sweeps, experiment with different noise types, and save custom configurations for quick playback.

What are the key features of this function generator app?

Key features include the ability to play standard test tones, perform frequency and volume sweeps, and utilize a sweep repeat/wobble function. It also offers music tone playback, fine-tuning selections, custom preset creation, and the generation of various noise types like white, pink, and brown noise. Advanced settings further enhance control over frequency range, sweep times, amplitude, and phase.

Is this app free to use?

Yes, the application is available for free. Based on the provided information, there are no in-app purchases or advertisements, indicating a completely free user experience.

What kind of audio signals can I generate with this app?

You can generate a wide range of audio signals, including basic test tones such as sine, rectangular, triangular, and sawtooth waves. Additionally, the app supports generating frequency sweeps (both ascending and descending), volume sweeps, and various types of noise including White, Pink, Violet, Grey, Brown, and Blue noise.

Who would benefit from using this audio function generator?

This app is ideal for audio professionals, sound engineers, musicians, electronics hobbyists, and anyone involved in audio testing, calibration, or sound design. Its intuitive interface and extensive features make it useful for tasks ranging from basic tone generation to complex signal analysis and experimentation.