HI Alex,
Fourier Analysis is what you should start with to understand the basics.
Then you might want to look into: Discrete Fourier Transform, and more specifically the Fast Fourier Transfer which will allow you to analyse the frequency content of your recording. According to the wieght of each frequency component in your signal you will be able to display the signal in the frrequency domain.
hope that helps,
Charles
--- On Mon, 23/6/08, Alex Kac <email@hidden> wrote:
From: Alex Kac <email@hidden>
Subject: Newbie questions - Waveform during recording
To: email@hidden
Date: Monday, 23 June, 2008, 4:33 PM
OK so I've Googled,
searched the archives and have not found what I am
looking for. Now its important to note that I haven't done anything
major in audio ever besides some simple sound generation and audio
recording/playback. I am not looking to become an expert in CoreAudio,
but simply to get what I need done and gone on.
So what am I trying to do: Record audio and display a waveform or sine
wave or some visualization that gives a user an idea of what they are
recording. I'd really like to do a visualization similar to what
iTunes and many MP3 players do with the 16 or so bars that show
amplitude broken out, but as always I believe the issue is my
ignorance of the terminology to even find exactly what I'm looking for.
I have found the CoreAudio samples for doing waveforms, but its
designed for playback and I can't seem to get the same AudioQueue
properties for recording as playback.
So the audio
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