Diapason Audio Generator
Audio generation since 2010
$1.99
2.7for iPhone, iPad and more
Age Rating
Diapason Audio Generator Screenshots
About Diapason Audio Generator
This App is a powerful test tone generator. Yet it is extremely simple to use. No other audio generator App is as complete as this one whatever its price !
You can combine (add) up to 4 independent sources and send the result to left and/or right speaker. There is a phase switch for each channel.
Available test tone types are: sine wave, square, triangle, saw tooth, white noise, pink noise.
As you can see on sample images, first source is very basic and thus very easy to use. Second source is more complex and allows sweeping of frequency for sine waves. Third source is quite similar to the previous one except that frequencies are aligned with a musical scale (reference is 440Hz). Fourth source is for narrow band noise.
Rotating knobs are there to ease frequency selection.
The display at bottom of first tab is a rough waveform viewer, to monitor the generated signal.
The output RMS power of a channel is indicated. Clipping is indicated as well should it occur (sources are added).
Any comment, any feedback ? There is a blog for this.
Note that the built-in speaker cannot reproduce the highest and lowest frequencies (below 400 and above 11000Hz to give an idea). You will ear these frequencies only with a good headphone or HiFi system.
You can combine (add) up to 4 independent sources and send the result to left and/or right speaker. There is a phase switch for each channel.
Available test tone types are: sine wave, square, triangle, saw tooth, white noise, pink noise.
As you can see on sample images, first source is very basic and thus very easy to use. Second source is more complex and allows sweeping of frequency for sine waves. Third source is quite similar to the previous one except that frequencies are aligned with a musical scale (reference is 440Hz). Fourth source is for narrow band noise.
Rotating knobs are there to ease frequency selection.
The display at bottom of first tab is a rough waveform viewer, to monitor the generated signal.
The output RMS power of a channel is indicated. Clipping is indicated as well should it occur (sources are added).
Any comment, any feedback ? There is a blog for this.
Note that the built-in speaker cannot reproduce the highest and lowest frequencies (below 400 and above 11000Hz to give an idea). You will ear these frequencies only with a good headphone or HiFi system.
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What's New in the Latest Version 2.7
Last updated on Feb 25, 2022
Old Versions
Visual bug correction
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Version History
2.7
Feb 25, 2022
Visual bug correction
2.6
Feb 20, 2022
Re-compiled for latest iOS. Better handling of various screen sizes and shapes.
2.5
Dec 29, 2019
Optimized for latest iPhones (11) and iOS (13)
2.4
Dec 22, 2019
Fine tuned for latest iPhone styles
2.3
Jan 12, 2019
Narrow band noise samples (Source D) re-designed to be more stable and pleasant to hear.
2.2
Mar 6, 2017
Recompiled for latest iOS
2.1
Feb 26, 2015
Updated to support natively latest architectures (arm64). No change expected from user's point of view
2.0
Dec 12, 2014
A 4th source added, to generate narrow band noise
1.9
Mar 25, 2014
Minor update
1.8
Mar 6, 2014
Migration to iOS7
1.7
Oct 26, 2012
Now optimized for both iPhone and iPad: it's a "universal" App.
Using latest iOS - 6.0 - but backward compatible down to 5.0.
Using latest iOS - 6.0 - but backward compatible down to 5.0.
1.6
May 31, 2012
Re-compiled with latest iOS but still backward compatible down to iOS 4.3
1.5
Dec 8, 2011
Updated to support latest iOS versions
1.4
Jul 28, 2010
Built for iOS4.
One additional feature:
* sweep for SourceB can now be either linear or log-like. Previously it was linear only.
Some improvements:
* When speakers are switched off, sweep frequencies are reset so that they always start with minimum frequencies: easier to synchronize with an external equipment
* sweep time for SourceB is now selected with a slider and no more among few fixed values. Longest time is 300s iso 60s
* sweep spread settings for SourceB changed
* display is improved when only right speaker is active (synchronization)
One additional feature:
* sweep for SourceB can now be either linear or log-like. Previously it was linear only.
Some improvements:
* When speakers are switched off, sweep frequencies are reset so that they always start with minimum frequencies: easier to synchronize with an external equipment
* sweep time for SourceB is now selected with a slider and no more among few fixed values. Longest time is 300s iso 60s
* sweep spread settings for SourceB changed
* display is improved when only right speaker is active (synchronization)
1.3
May 10, 2010
Very minor update: the info button is more sensitive and bigger
1.2
Feb 17, 2010
Small bug corrected: sweep modes TRIangle and SAW were inverted.
Compiled with latest OS 3.1.3.
Compiled with latest OS 3.1.3.
1.1
Feb 3, 2010
Cosmetic update only, including startup screen
1.0
Jan 26, 2010
Diapason Audio Generator FAQ
Click here to learn how to download Diapason Audio Generator in restricted country or region.
Check the following list to see the minimum requirements of Diapason Audio Generator.
iPhone
Requires iOS 12.2 or later.
iPad
Requires iPadOS 12.2 or later.
iPod touch
Requires iOS 12.2 or later.
Diapason Audio Generator supports English
