tag:dev.sinusoid.com,2005:/2010/12?format=atomSinudev - Technical Notes : Archives for Sinudev - Technical Notes Archives for Sinudev - Technical Notes December 2010 sinusoid technical area - microcontrollers2012-08-12T00:29:16ZTypourn:uuid:f5d6bcfc-c86f-4d05-8483-52eb02cd63672010-12-11T01:03:17Z2012-08-12T00:29:16ZmarklvitiPhone Audio Kit update 1.4<p>The <a href="http://store.sinusoid.com/iTunes_AudioKit.html">Audio Kit iPhone App</a> from Sinusoid Pty Ltd has a new release, version 1.4<br />
<br>
<p>The App includes the following tools:</p>
</p>
<ul><li>A real time <strong>Spectrum Analyser</strong></li>
<li><strong>Scope</strong> – an oscilloscope to display waveforms</li>
<li>an <strong><span class="caps">SPL</span></strong> (sound pressure level)<strong> Meter</strong></li>
<li>and a sine wave <strong>Signal Generator</strong></li>
</ul>
<p>Since the first release the following features have been added:</p>
<p>
<ul>
<li>Enhanced frequency calculation improves resolution of peaks to within 1Hz.</li>
<li>Single tap to freeze Spectrum screen. Can be disabled in preferences.</li>
<li><span class="caps">SPL</span> meter has a continuous ticker style trace of the <span class="caps">SPL</span> over time.</li>
<li>Improved sine wave generation.</li>
<li>Signal Generator now includes white noise and pink noise signal types, in addition to the existing sine wave signal.</li>
<li>Spectrum display has 6 selectable <span class="caps">FFT</span> window function types – Hamming, Hann, Rectangular, Bartlett, Triangular and Blackman.</li>
<li>Spectrum now has selectable <span class="caps">FFT</span> sizes of 8192, 4096 and 2048, giving much better resolution of frequencies.</li>
<li>Persistent settings for all user preferences.<br />
All of the user preferences in each of the above applications can be made persistent between restarts of the App.</li>
<li>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.</li>
</ul>
<p>Common uses for this App include:<br />
<ul> <br />
<li>checking for feedback and resonance frequencies when setting up PA systems</li><br />
<li>an inexpensive oscilloscope to view audio waveforms</li><br />
<li>measuring sound pressure levels</li><br />
<li>providing audio test signals</li></p>
</ul>
<p><a href="http://dev.sinusoid.com/files/spectSS1_4.png" onclick="window.open('http://dev.sinusoid.com/files/spectSS1_4.png','popup','width=480,height=300,scrollbars=no,resizable=yes,toolbar=no,directories=no,location=no,menubar=no,status=yes,left=0,top=0');return false"><img src="http://dev.sinusoid.com/files/spectSS1_4-tm.jpg" height="200" width="320" border="1" hspace="4" vspace="4" alt="Audio Kit Spectrum Screen Shot 1.4" title="Audio Kit Spectrum Screen Shot 1.4" /></a></p>
<p><a href="http://dev.sinusoid.com/files/settingsSS1_4.png" onclick="window.open('http://dev.sinusoid.com/files/settingsSS1_4.png','popup','width=480,height=300,scrollbars=no,resizable=yes,toolbar=no,directories=no,location=no,menubar=no,status=yes,left=0,top=0');return false"><img src="http://dev.sinusoid.com/files/settingsSS1_4-tm.jpg" height="200" width="320" border="1" hspace="4" vspace="4" alt="Audio Kit Settings Screen Shot 1.4" title="Audio Kit Settings Screen Shot 1.4" /></a></p>
<p><a href="http://dev.sinusoid.com/files/siggenSS1_4.png" onclick="window.open('http://dev.sinusoid.com/files/siggenSS1_4.png','popup','width=480,height=300,scrollbars=no,resizable=yes,toolbar=no,directories=no,location=no,menubar=no,status=yes,left=0,top=0');return false"><img src="http://dev.sinusoid.com/files/siggenSS1_4-tm.jpg" height="200" width="320" border="1" hspace="4" vspace="4" alt="Audio Kit 1.4 Signal Generator" title="Audio Kit 1.4 Signal Generator" /></a></p>
<p><a href="http://dev.sinusoid.com/files/scopeSS1_4.png" onclick="window.open('http://dev.sinusoid.com/files/scopeSS1_4.png','popup','width=480,height=300,scrollbars=no,resizable=yes,toolbar=no,directories=no,location=no,menubar=no,status=yes,left=0,top=0');return false"><img src="http://dev.sinusoid.com/files/scopeSS1_4-tm.jpg" height="200" width="320" border="1" hspace="4" vspace="4" alt="Audio Kit 1.4 Scope Screen Shot" title="Audio Kit 1.4 Scope Screen Shot" /></a></p>
<p><a href="http://dev.sinusoid.com/files/splS1_4.png" onclick="window.open('http://dev.sinusoid.com/files/splS1_4.png','popup','width=480,height=300,scrollbars=no,resizable=yes,toolbar=no,directories=no,location=no,menubar=no,status=yes,left=0,top=0');return false"><img src="http://dev.sinusoid.com/files/splS1_4-tm.jpg" height="200" width="320" border="1" hspace="4" vspace="4" alt="Audio Kit 1.4 SPL Meter Screen Shot" title="Audio Kit 1.4 SPL Meter Screen Shot" /></a></p>
<p>
<p>See the <a href="http://store.sinusoid.com/catalog/software/iphone-apps/audio-kit.html">Sinusoid web site</a> for more information or this direct link to<br />
<a href="http://store.sinusoid.com/iTunes_AudioKit.html">iTunes App store.</a> <br />
<a href="http://store.sinusoid.com/iTunes_AudioKit.html"><img src="http://dev.sinusoid.com/files/AKIcon-tm.jpg" /></a></p>
</p>
<p><a href="http://dev.sinusoid.com/articles/2010/09/16/iphone-audio-kit-update-1-3">Audio Kit 1.3 Release</a></p><hr /><p><small>Original article writen by marklvit and published on <a href='http://dev.sinusoid.com'>Sinudev - Technical Notes</a> | <a href='http://dev.sinusoid.com/2010/12/11/iphone-audio-kit-update-1-4'>direct link to this article</a> | If you are reading this article elsewhere than <a href='http://dev.sinusoid.com'>Sinudev - Technical Notes</a>, it has been illegally reproduced and without proper authorization.</small></p>