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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US">As long as you only need to detect specific frequencies, the Goertzel algo should be ok:
<a href="http://stackoverflow.com/questions/11579367/implementation-of-goertzel-algorithm-in-c">
http://stackoverflow.com/questions/11579367/implementation-of-goertzel-algorithm-in-c</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p>&nbsp;</o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US">Applying the algo to the correct portions of wav file is left as an exercise for the reader ;)
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p>&nbsp;</o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US">Regards<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US">/R<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p>&nbsp;</o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> portaudio-bounces@lists.columbia.edu [mailto:portaudio-bounces@lists.columbia.edu]
<b>On Behalf Of </b>keghn@netscape.net<br>
<b>Sent:</b> den 14 mars 2016 15:36<br>
<b>To:</b> portaudio@lists.columbia.edu<br>
<b>Subject:</b> [Portaudio] Cannot find a ease hello world FFT or what ever frequency finder.<o:p></o:p></span></p>
<p class="MsoNormal"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black;background:white">Is there a c/c&#43;&#43; software that looks for a certain frequency in a wav file? For example, like a c/c&#43;&#43; function that will return the strength 440Hz
 frequency between 10 seconds and 12 seconds in a 60 second wav file.</span><span style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
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