Re: Gain Staging?
Re: Gain Staging?
- Subject: Re: Gain Staging?
- From: Doug Wyatt <email@hidden>
- Date: Tue, 20 Nov 2001 22:01:17 -0500
On the other hand, the output Audio Units have a parameter that does
software gain scaling. It's the only parameter, numbered 14 if I
remember correctly (use GetParameterInfo to be sure), float values from
0-1.
Doug
On Monday, November 19, 2001, at 02:44 , Jeff Moore wrote:
on 11/19/01 6:35 AM, email@hidden <email@hidden> wrote:
It seems that in CoreAudio - when you adjust the output level on the
device
you
are effecting master volume... Is there any concept of a mixer in
CoreAudio?
In other words can I change the output volumes on devices without
effecting
the
master volume. If you have ever worked in Windows you will see outputs
seperatley from the master playback line. This would for example
allow you to
mute the cd player but still output from a wave source...
The volume controls that the HAL gives you are what is on the hardware
and
nothing more. For instance, the built-in hardware has no master volume
control but has an individual volume control for each channel. So the
situation you are describing doesn't happen as there isn't any master
control to change.
--
Jeff Moore
Core Audio
Apple
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--
Doug Wyatt
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"Premature optimization is the root of all evil."
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