fantastic - thanks very much a
On 23 November 2011 14:33, Gerry Beauregard <[email protected]>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 > > [email protected] > > http://chattyfig.figleaf.com/mailman/listinfo/flashcoders > > > _______________________________________________ > Flashcoders mailing list > [email protected] > http://chattyfig.figleaf.com/mailman/listinfo/flashcoders > _______________________________________________ Flashcoders mailing list [email protected] http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
