holy crap - i've been playing with this so far and it's amazing - thanks so much for your help
a On 23 November 2011 14:44, allandt bik-elliott <alla...@gmail.com> wrote: > fantastic - thanks very much > > a > > > On 23 November 2011 14:33, Gerry Beauregard <gerry.beaureg...@sonoport.com > > wrote: > >> My real-time spectrum analyzer code would be a good place to start. >> http://www.audiostretch.com/spectrum/ >> >> It grabs audio from the mic, applies a Hanning analysis window, does an >> FFT, converts to a log-magnitude (dB scale) spectrum, and plots the >> spectrum at regular time intervals. It doesn't go quite so far as >> extracting the pitch/note, but that's mostly a matter of finding the first >> big peak in the spectrum, and doing a bit of interpolation around the peak >> to get sub-FFT-bin accuracy. >> >> Code can be found here: >> >> http://gerrybeauregard.wordpress.com/2010/08/06/real-time-spectrum-analysis/ >> >> It relies on my FFT which can be found here: >> http://gerrybeauregard.wordpress.com/2010/08/03/an-even-faster-as3-fft/ >> >> -Gerry >> >> >> >> On 2011-11-23 , at 22:11 , allandt bik-elliott wrote: >> >> > hey guys >> > >> > does anyone have any references / links to help me understand how to >> > extract the note / tone / pitch from a sound captured from a mic >> > >> > i have a view to deal with the mic and i am capturing the output >> correctly >> > but i need to understand how to check it for specific pitch ranges >> > >> > here is my class so far - i'd like the controller to be able to apply >> some >> > logic to decide how the app should respond from there (using >> > controller.updateAudioSample(audioChunk);) >> > >> > [CODE] >> > package uk.co.publicis.toothbrushdetectorapp.views >> > { >> > // imports >> > ... >> > public class MicView extends View implements IView >> > { >> > private var _mic : Microphone; >> > public function MicView(model:Model, controller:Controller=null) >> > { >> > super(model, controller); >> > init(); >> > } >> > private function init():void >> > { >> > if (Microphone.isSupported) >> > { >> > _mic = Microphone.getMicrophone(); >> > _mic.enableVAD = true; >> > _mic.encodeQuality = 0; >> > _mic.rate = 8; >> > } >> > } >> > /* INTERFACE uk.co.publicis.toothbrushdetectorapp.views.IView */ >> > public function destroy():Boolean >> > { >> > disable(); >> > _mic = null; >> > return true; >> > } >> > public function enable():Boolean >> > { >> > if (Microphone.isSupported) >> > { >> > _mic.addEventListener(ActivityEvent.ACTIVITY, handleActivity); >> > // odd behaviour - if this is not added here, no ActivityEvent.ACTIVITY >> > will be captured either. >> > // makes it impossible to start / stop capturing the SAMPLE_DATA on >> > ACTIVITY events >> > _mic.addEventListener(SampleDataEvent.SAMPLE_DATA, handleSampleData); >> > } >> > return true; >> > } >> > public function disable():Boolean >> > { >> > if (Microphone.isSupported) >> > { >> > _mic.removeEventListener(ActivityEvent.ACTIVITY, handleActivity); >> > _mic.removeEventListener(SampleDataEvent.SAMPLE_DATA, handleSampleData); >> > } >> > return true; >> > } >> > private function handleActivity(e:ActivityEvent):void >> > { >> > if (e.activating) >> > { >> > controller.activate(); >> > } >> > else >> > { >> > controller.deactivate(); >> > } >> > } >> > private function handleSampleData(e:SampleDataEvent):void >> > { >> > var audioChunk:ByteArray = e.data as ByteArray; >> > controller.updateAudioSample(audioChunk); >> > } >> > public function get model():TBDModel >> > { >> > return _model as TBDModel; >> > } >> > public function get controller():TBDController >> > { >> > return _controller as TBDController; >> > } >> > } >> > } >> > [/CODE] >> > >> > thanks in advance >> > a >> > _______________________________________________ >> > Flashcoders mailing list >> > Flashcoders@chattyfig.figleaf.com >> > http://chattyfig.figleaf.com/mailman/listinfo/flashcoders >> >> >> _______________________________________________ >> Flashcoders mailing list >> Flashcoders@chattyfig.figleaf.com >> http://chattyfig.figleaf.com/mailman/listinfo/flashcoders >> > > _______________________________________________ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
