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You can think of auGEN X in two ways:  first, it is a handy utility for making audio test sounds, and second, it is a performable creative sound design tool.

Price $19.99
Author auDSPr
Type Instrument, Tool
Instrument type Synth
Instrument sounds Other
Supports Audio Unit (AU)
Rating total: 3.6 (5), current: 3.6 (5)
Version 1.1.1
Released 12/18/2018
Updated 09/15/2020
auGEN X bridges the creative musical world of artists with the exacting scientific world of audio engineers. What started as a precision audio test utility has grown into a fun experimental sound design instrument. On one end use auGEN X to help set up, test, calibrate, and optimize your audio system. On the other use it to create a wide variety of interesting sounds.

auGEN X has a full-featured audio oscillator, a high quality noise generator, and an impulse generator. The simple yet powerful user interface is designed for fast, precise, intuitive control over your signals. auGEN X works both as a Stand-Alone App and as an AUv3 Audio Unit Extension responding to MIDI In and BPM Sync from Hosts.

I started making this app because as an audio electronics engineer I could not find a single audio generator that does everything that I require AND is an AUv3 Audio Unit. auGEN X has expanded into a musical tool for exploring and learning sound design. Our goal is for auGEN X to be an Essential in your audio toolbox. We hope you enjoy it and we’re excited to hear the cool things that you do with auGEN X!

"I really see this app becoming a standard and a must have component in one's iOS audio app arsenal."
- Paul Henry, Paul Henry Pro Audio


- Oscillator
  - 3 Modes:  Fixed, Frequency or Level Sweep
  - 4 Wave Shapes:  Sine, Triangle, Rectangle, & Saw
    - Tri & Rect have a Duty Cycle control (1.0% to 99.0%)
    - Tri, Saw, & Rect are alias-suppressed yielding virtually alias-free performance at musical fundamental frequencies
  - 10 to 20,480 Hz extended audio frequency range (great for testing subwoofers!)
  - Full-featured Frequency or Level Sweep with 5 Types, settable Direction, & selectable Repeat or 1-Shot Mode
    - Sweep Period has a wicked wide range from 1/10,000th of a second to 100 seconds and can alternatively be set as a Sweep Rate in Hz or BPM
      - Wide sweep range allows for FM & AM style sounds
- Noise Generator
  - 2 Modes:  Fixed or Level Sweep
  - White or Pink Noise
    - Pink Noise conforms to SMPTE Standard 2095-1:2015 Calibration Reference Wideband Digital Pink Noise Signal
- Impulse Generator (useful for checking reverb algorithms)
  - Impulse Width can be set in samples

- AUv3 Audio Unit Extension or Stand-Alone App
  - Verified to work great in AUv3 Hosts such as GarageBand, Cubasis, AUM, apeMatrix, BeatMaker 3, & Auria Pro
  - As a Stand-Alone App audio is sent to iPad's built-in speakers, Headphone/Line Out, or to any iOS-compatible USB audio interface connected to the Lightning jack


- Creative experimental sound design
  - Sound effects for film, TV, & games
  - Great chiptune style sounds
  - Synthesize sirens or alarms
- Test, characterize audio equipment
- Set up or dial in a home theater
- Tune car audio systems
- Test subwoofers
- Hearing tests
- Ear training
- Vibration analysis


- Audio signal path uses state of the art Double Precision 64-bit Floating Point for maximum accuracy
- Stereo out
  - Selectable Pan Laws include Linear & Constant Power Panning
- Supports 44.1, 48, 88.2, & 96 kHz sample rates
- User Guide embedded in App - no internet connection required to read it


- Compatible with iOS 9.0 & up (iPad 2, iPad mini (1st Generation), & up)
  - Support way back to iOS 9 means auGEN X works on every iPad model (except the very first iPad).
    Breathe new life into your old iPad by using auGEN X to make it a dedicated, precision audio source.
- AUv3 Audio Unit Extensions require iPad 4, iPad mini 2, and up
- 88.2 & 96 kHz sample rate require iOS-compatible USB audio interface connected to the Lightning jack

Watch demos & tutorials on auDSPr's YouTube channel.

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Version 1.1.1 release notes

Version 1.1.1 (11) is a patch release to correct a few issues that crept into the last release: - Fixed a crash which occurred when running multiple instances in some Host Apps. - Fixed Host BPM Sync which accidentally got broken in the last release. - Fixed issue where MIDI Input Settings were not showing when running in Audio Unit Host Apps. We apologize for any inconvenience the previous Version 1.1 might have caused.