Re: Audio Units:Updating Parameters in GUI automatically
Re: Audio Units:Updating Parameters in GUI automatically
- Subject: Re: Audio Units:Updating Parameters in GUI automatically
- From: William Stewart <email@hidden>
- Date: Thu, 19 Apr 2007 17:06:08 -0700
Instead of calling SetParameter, you should call AUParameterSet
(<AudioToolbox/AudioUnitUtilities.>) - its nearly as simple :)
On 18/04/2007, at 9:58 PM, Metzar, Nicholas W wrote:
(This is might be somewhat of a newbie question, but probably a
little deeper than that...)
Here is a question/situation that I think should be easy to
answer. Or rather...I hope is easy to answer.
Heres the situation... say I'm making an AU plugin with a simple
generic view.
This plugin has several parameters...doesn't matter what they are/
do/represent: gain, delay, whatever.
I want the the plugin to change the value of the parameter
automatically based on any sort of condition, ***AND*** update the
GUI to reflect this change. For example:
if (a != b)
{
mAudioUnit->SetParameter(kParam1, new_value);
}
This piece of code would (does) work great in the kernel process
(just once a buffer, not every sample...I really don't need that).
I can hear the change happening as expected by updating kParam1 to
its new_value whenever a!=b. However, the slider bar does not move
in the GUI. I really really want to see that happen. Its feedback
to the user that shows them what is happening. How do I make that
happen? Why doesn't SetParameter do it?
Ideally, the answer to this question is nearly as simple as the
example code I posted, although I'm aware my expectations may be high.
Thanks for any and all help!
-Nick
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