Re: setting mic volume
Re: setting mic volume
- Subject: Re: setting mic volume
- From: Daniel Birns <email@hidden>
- Date: Fri, 31 Oct 2008 14:53:18 -0700
I've tried HALLab on the Duet, and apparently they expose output mute
and output volume but nothing else. Apparently Maestro is doing the
communications in a proprietary way? That is, the output mute and
volume button and slider both work, but all the input gui is greyed
out (except for the channel setting).
Does this sound true? If so, are you aware of any other similar
devices that support input volume control through CoreAudio (HALLab)?
I'm looking to write software that, among other things, automatically
controls preamp volume. Perhaps I can only support certain devices,
which would be fine. I just need to know which ones support this.
--Daniel
On Oct 31, 2008, at 11:15 AM, Jeff Moore wrote:
You'll want to take a look at HALLab from the sample code in our
SDK. It shows how to twiddle the various knobs an audio device might
have.
On Oct 31, 2008, at 5:23 AM, Daniel Birns wrote:
Is there a programmatic way to set mic volume at the hardware level.
To give an example: I have an Apogee Duet, which is a firewire
device that, among other things, has a preamp and 2 mic inputs.
You can control the volume with a knob on the Duet, or with
software, called Maestro, from Apogee. Can I control that volume
from an Audio Unit? Or from a standalone program, like Maestro?
--
Jeff Moore
Core Audio
Apple
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