Audio Kit 2.3 - App Store

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About Audio Kit

Audio Kit is a collection of four tools which are essential for those working in audio, sound and music. A real time Spectrum Analyser, a Scope to display waveforms, an SPL (Sound Pressure Level) Meter, and a Signal...

Audio Kit is a collection of four tools which are essential for those working in audio, sound and music. A real time Spectrum Analyser, a Scope to display waveforms, an SPL (Sound Pressure Level) Meter, and a Signal Generator producing sine waves, white noise and pink noise. Sweep generation with In App Purchase. 
 -View a real time spectrum of audio with the Spectrum Analyser and identify peak frequencies precisely 
-View the actual waveform of the audio signal with the Scope 
-An SPL Meter provides measurement of sound levels using an A-weighting 
-The Signal Generator provides a sine wave output up to 20,000Hz in 1 Hz steps, along with noise generators for white and pink noise. Sweep generation with In App Purchase ** Spectrum
 ** FFT (Fast Fourier Transform) is used to calculate the frequencies in the Spectrum Analyser and these are displayed in real time. The frequency is displayed in either logarithmic or linear scale. Three FFT sizes of 8192, 4096 and 2048 are selectable, giving fine resolution of frequencies. Interpolation gives resolution to within 1Hz. 
6 different FFT window function types can be selected - Hamming, Hann, Rectangular, Bartlett, Triangular and Blackman. 
 Number of FFT windows can be selected from 1 through 4. The strongest frequency is displayed both above the peak, and optionally, in a large number display in the center of the screen. The large number display can be quickly switched on or off by double tapping the screen.
 There is a screen capture facility in the Spectrum Analyser allowing you to save the spectra for future reference along with details of the FFT parameters, time and date.
 A single tap freezes the screen. Other features such as screen capture and double tap to toggle large number display still work during the freeze. This feature can be turned off in preferences if it’s not desired.
 ** Scope ** The display of the Scope can be adjusted easily using pinch gestures in both horizontal and vertical directions. Zero crossing detection of the waveform provides a smooth display and can be set to either positive or negative direction zero crossing. 

There is a screen capture facility in the Scope allowing you to save waveforms for future reference.
 ** SPL Meter ** 
The SPL Meter continuously displays the sound pressure level using an A-weighting, and has resettable minimum and maximum displays also. SPL Meter can be calibrated against a reference standard or meter. SPL Meter has a continuous ticker style trace of the SPL over time.
 ** Signal Generator ** 
 The Signal Generator has 3 different output types: - Sine wave - White noise - Pink noise 
The output of the Signal Generator can be viewed on the other parts of the App.
 The sine wave frequency selected using picker wheels allows for accurate control of frequency to within 1Hz. Volume for the sine wave and noise signals is continuously adjustable.

 With an In App Purpose one can add a sine wave sweep generator functionality to the Signal Generator. The sweep generator can sweep increasing and decreasing frequencies, and using either a linear or log sweep rate. **Settings
 ** All of the user preferences in each of the above applications can be made persistent between restarts of the App. All parts of the App have direct access to a help document. Audio Kit - essential for those working in audio, sound and music.

Version History - Fixed bug with no audio for some devices running iOS 18 or iPadOS 18 - Fixed bug where spectrum fill did not render completely - Slightly expanded spectrum resolution 2.3 09/27/2024 - Fixed bug in sampling for some devices - now giving improved peak resolution - Fixed bug which favoured low end frequencies - Adjusted layouts and behaviours for recent hardware and OS releases 2.2.1 05/25/2020 - Fixed layout for recent devices and iOS versions - Minor bug fixes 2.1.1 11/05/2018 - Fixed layout for and iOS versions - Minor bug fixes 2.1 11/01/2018 - added availability of in-app purchase for sweep generator capability for Signal generator - reverted to 2 channel output for all Signal Generator outputs. - idle timer can now be disabled if auto lock is enabled on device. This allows user to run the app for long periods unattended without going into lock mode. - minor bug fixes - update for recent iOS releases 2.0 04/06/2016 -Update interface for iOS 8 -Fixed bug which caused FFT spectrum to crash when increasing number of windows 1.7.4 10/02/2014 -Fixes signal generator not working with iOS 7.1 on some 64 bit devices -Slight adjustment to SPL calibration for recent devices 1.7.3 04/20/2014 For 1.7.2 - bug fix - Fixes crashes in 64 bit devices For 1.7 - New features: - Update user interface for latest iOS version - Audio Kit can now run in both landscape modes with the ability to lock either one, or to allow rotation - Extra settings screen for the above feature - Sig Gen badge now displays noise type if noise is selected and running 1.7.2 10/24/2013 For 1.7.1 - Fixed volume slider which was difficult to operate in some cases - Fixed some settings for 64 bit version binary - Updated help file for information about privacy settings - Other Minor bug fixes and UI adjustments For 1.7 - New features: - Update user interface for latest iOS version - Audio Kit can now run in both landscape modes with the ability to lock either one, or to allow rotation - Extra settings screen for the above feature - Sig Gen badge now displays noise type if noise is selected and running 1.7.1 10/07/2013 - Update user interface for latest iOS version - Audio Kit can now run in both landscape modes with the ability to lock either one, or to allow rotation - Extra settings screen for the above feature - Sig Gen badge now displays noise type if noise is selected and running - Other Minor bug fixes and UI adjustments 1.7 09/19/2013 -fixed Sig Gen sound not being on from clean start when set on in user defaults. -fixed incorrect unit in scope grid description. -minor user interface adjustments. 1.6.1 10/22/2012 - Calibration for SPL Meter - Improved SPL Meter - Adjusted Signal Generator output volume for newer hardware - Minor bug fixes and interface improvements 1.6 03/13/2012 -Fixed a bug which caused SPL meter to crash in certain cases -Fixed Signal Generator volume control non-linearity -Other minor bug fixes -Note: This will be the last release of Audio Kit supporting iOS 3.0 1.5 07/13/2011 -Enhanced frequency calculation improves resolution of maximum peaks to within 1Hz -Single tap to freeze Spectrum screen. Can be disabled in preferences -Ability to select number of FFT windows from 1 through 4 -SPL meter has a continuous ticker style trace of the SPL over time -Improved sine wave generation. Occasionally missed a 1 Hz step in previous version. -Tested with iOS4.2 -Other minor bugfixes and improvements 1.4 12/10/2010 -Fixes minor bug where moving the volume slider when the Signal Type is in the Off position caused the Signal Generator to turn on. -Other minor tweaks In addition to the new features from 1.3: -Spectrum now has selectable FFT sizes of 8192, 4096 and 2048, giving much better resolution of frequencies. -Signal Generator now includes white noise and pink noise signal types, in addition to the existing sine wave signal. 1.3.1 09/25/2010 -Spectrum now has selectable FFT sizes of 8192, 4096 and 2048, giving much better resolution of frequencies. -Signal Generator now includes white noise and pink noise signal types, in addition to the existing sine wave signal. 1.3 09/15/2010 -Improved sine wave generation at high frequencies -Fixes freeze of large number display on some devices -Fixes lockup on some devices after phone call interruption 1.2 08/04/2010 This first update to Audio Kit includes the following: -Large number display of strongest frequency in Spectrum display. This is in addition to the small moving text above the peak, and can be quickly turned on or off by tapping screen. -6 selectable FFT window function types - Hamming, Hann, Rectangular, Bartlett, Triangular and Blackman. -Persistent settings for all user preferences. This is accessible from a new, fifth tab. -removed back button in help document screen. -screen capture now removes tab bar, status bar and other buttons from image 1.1 07/28/2010 1.0 06/18/2010

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Previous Versions

Here you can find the changelog of Audio Kit since it was posted on our website on 2016-10-01 18:22:20. The latest version is 2.3 and it was updated on 2026-06-24 14:28:45. See below the changes in each version.

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