Audio Kit iPhone App version 1.4 released by Sinusoid Pty Ltd

By on Dec 10, 2010 at 6:39 am

Sydney, Australia – Sinusoid Pty Ltd today is pleased to announce the release of Audio Kit 1.4 for iOS. 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. Users can view a real time spectrum of audio, identifying peak frequencies, as well as view the actual waveform of the audio signal and much more.

Audio Kit Features:
* 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

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. 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 both the Spectrum Analyser and the Scope allowing you to save the spectra and waveforms for future reference.

SPL Meter:
The SPL Meter continuously displays the sound pressure level, and has resettable minimum and maximum displays also. There is also a colored bar type indication of the measured SPL at the left hand side of the screen. A sliding ticker type plot of the SPL readings over time is displayed across the bottom of the SPL screen. If the reset button is pressed the peak registers a mark of full scale then zero.

Signal Generator:
The output of the Signal Generator can be viewed on the other parts of the App. 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.

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 context sensitive help document.

New features for version 1.4
* Enhanced frequency calculation improves resolution of peaks to within 1Hz
* Single tap to freeze Spectrum screen. Can be disabled in preferences
* 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 iOS 4.2
* Other minor bugfixes and improvements

Device Requirements:
* iPhone, iPod touch (2nd, 3rd and 4th Gen), and iPad
* Requires iOS 3.0 or later (iOS 4.0 Tested)
* 0.4 MB

Pricing and Availability:
Audio Kit 1.4 is $4.99 USD (or equivalent amount in other currencies) and available worldwide exclusively through the App Store in the Music category.

Sinusoid
Audio Kit 1.4
Purchase and Download
Screenshots
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Located in Sydney, Australia, Sinusoid Pty Ltd is a company producing electronics parts and software products. Sinusoid produces Audio Kit which is an iPhone App used for analysis of Audio signals. Sinusoid also manufactures in Australia electronics sensors such as the RPE1 and RPE2 rotational position encoders which are used in industrial control applications. Copyright (C) 2010 Sinusoid Pty Ltd. All Rights Reserved. Apple, the Apple logo, iPhone, iPod and iPad are registered trademarks of Apple Inc. in the U.S. and/or other countries.

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