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Re: Monitoring input level
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Re: Monitoring input level


  • Subject: Re: Monitoring input level
  • From: Neil Clayton <email@hidden>
  • Date: Mon, 19 Jun 2006 07:40:13 +0100

Hmm. I may be able to answer some of my own question.

I've looked at the MatrixMixerTest, and I see that it uses the AUGraph (mixer) plus AudioUnitGetParameter to get hold of avg power and peak power.
It seems somewhat complex to me (settings up the AUGraph, making sure formats are correct, etc). I was naively expecting a 'GetPeakPowerFromAudioDeviceID() function'. From my reading so far, I'm assuming the inputProc is required only to feed data INTO the mixer (to have something to sample). So my questions are now:


1) For monitoring audio, is using an AUGraph + AudioUnitGetParameter the preferred way to go?
2) Assuming it is; How would I pipe input from say, a micrphone, into the mixer? Should I be using AUHAL?


Sorry if these are newbie questions. I'm still very new to CoreAudio (and audio processing in general).

Regards,
Neil Clayton



On 17 Jun 2006, at 13:16, Neil Clayton wrote:


Is there a method I can use in CA to monitor the input level of some device?
I'd like to do something similar to the input level monitor in System Preferences / Sound.


---
Neil Clayton



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