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Newbie questions - Waveform during recording
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Newbie questions - Waveform during recording


  • Subject: Newbie questions - Waveform during recording
  • From: Alex Kac <email@hidden>
  • Date: Mon, 23 Jun 2008 10:33:17 -0500

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 recording part was easy. I currently show the peak and average level graphically which is fine and easy to do. So would someone who has some experience with this at least point me in the right direction? Maybe throw some terms I can look up and at least know what I'm supposed to learn to do this? Thanks!
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