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Re: Controlling gain on microphone
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Re: Controlling gain on microphone

  • Subject: Re: Controlling gain on microphone
  • From: Paul Davis <email@hidden>
  • Date: Sat, 31 May 2014 08:25:30 -0400



On Sat, May 31, 2014 at 7:51 AM, Allison Newman <email@hidden> wrote:
>
> My application currently connects the microphone to the speakers, using AudioUnits to use my Mac as an amplifier, and it works just fine.  I would like to be able to control the gain of the microphone using a slider, and was wondering if anyone had a suggestion of how to do it.  Ideally, I’m looking for a solution that introduces as little latency as possible between the microphone and the speakers.
>
> I was hoping to find an AudioUnit that I could insert into the AudioGraph to do this, but at least my initial analysis seems to indicate that this is not the case.


There is some confusion here. The gain of the microphone is a hardware property. AudioUnits are generally blobs of code that carry out signal processing. If you mean you want to add gain to the signal, then an AudioUnit can do that. But it would quite suprising to use an AudioUnit to control the hardware gain on the microphone - this is generally controlled from system preferences and/or using APIs quite separate from AudioUnits.
 
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