Re: Overriding SupportedNumChannels
Re: Overriding SupportedNumChannels
- Subject: Re: Overriding SupportedNumChannels
- From: email@hidden
- Date: Fri, 2 Jul 2010 16:58:03 -0700 (PDT)
- Importance: Normal
AU Lab does not (and never has) require the same number of input channels
and output channels. But it will only display a list of appropriate
effects for the type of track that you are on. Ie, if you have a 2 channel
input track and a two channel output track, only effects that support 2->2
will be displayed.
If your effect supports 1->2, you need to use a mono input track and a
stereo output track. Then your effect will show up in the mono->stereo
list.
For you, your effect is 1->8, so you need to create a multichannel output
(use the octagonal setting to get 8 channels), and a mono input. Your
panner unit will be listed under "Mono->8 Channel Panners"
Hope this helps!
Michael
On Tue, June 29, 2010 1:55 pm, Alex Weiss wrote:
> Hey,
>
> I think I found the culprit. First of all, it seems that AULab expects
> the same number of input and output channels. In my case, I need an
> 8-channel output and thus also need to declare 8 inputs.
> AUPannerBase::GetChannelLayoutTags, however, only declares three
> possible input tags: mono, stereo, and B-format. Overriding
> GetChannelLayoutTags and adding kAudioChannelLayoutTag_AudioUnit_8
> seems to do it.
>
> It's still rather annoying that AULab expects the same number of input
> and output channels. Is there no way to simulate an 1 --> 8 channel
> situation?
>
> Alex
>
>
>
> On Tue, Jun 29, 2010 at 7:06 PM, tahome izwah <email@hidden>
> wrote:
>> I'm afraid I don't know why it does this, I just noticed that a {1,2}
>> config works if you offer a {2,2} config as well.
>>
>> Bill, any idea why this is the way it is?
>> --th
>>
>>
>> 2010/6/29 Alex Weiss <email@hidden>:
>>> Hey Tahome,
>>> thanks for your reply. The {2, 2}/{1, 2} combination does indeed work.
>>> But if my plug-in is supposed to have a {1, 8} configuration? I tried
>>> to add several second configurations to make AULab happy, but try as I
>>> might, I can't get it to run. I always get the same error.
>>> Interestingly enough, if I use a combination of {1,8} and {8, 8}, the
>>> AULab at least displays the AU on the list of possible 8-channel
>>> plug-ins. If I use {1,8} and {2, 8} instead, it doesn't even show up.
>>>
>>> Alex
>>>
>>>
>>>>I think that's a long standing bug in AULab - if you add the {2, 2}
>>>>configuration then {1, 2} works as well (IIRC, it's been a while).
>>>>
>>>>--th
>>>
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