Re: Audio Unit Supported Channels
Re: Audio Unit Supported Channels
- Subject: Re: Audio Unit Supported Channels
- From: Paul Davis <email@hidden>
- Date: Mon, 28 Mar 2011 13:57:34 -0400
On Mon, Mar 28, 2011 at 1:47 PM, Matthew Hubble
<email@hidden> wrote:
> Developing an AU effect plug-in, and when I run the auval tool on it it
> passes but I get this warning message (among others with different numbers
> for InputChan and OutputChan):
>
> WARNING: Can Initialize Unit to un-supported num channels:InputChan:1,
> OutputChan:2
>
> What is the method for ensuring that it cannot initialize with unsupported
> channel configurations? Also, what is the method AUs use to tell the host
> which input/output channel configurations they support? Can't seem to find
> it.
they don't tell the host; the host asks the plugin. i use
CAAudioUnit::GetChannelInfo()
which looks up the kAudioUnitProperty_SupportedNumChannels property.
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