Re: Multichannel to Stereo in Logic
Re: Multichannel to Stereo in Logic
- Subject: Re: Multichannel to Stereo in Logic
- From: Stefan Huber <email@hidden>
- Date: Wed, 27 Oct 2010 11:59:07 +0200
Thanks for all your replies. It's difficult for me to be too specific about the plug-in since the topic is complex and I am not sure how much I am allowed to publish at the moment. What I can say is that I need to input two (microphone) signals for the mono version of the plug-in. So there are two equally important signals fed into the plug-in. These two signals are combined to one - therefore, I need one output. Of course, Stereo output with 2 equal signals would be fine.
For the stereo version of that plug-in, I will need 4 inputs and 2 outputs. At that point there are 2 possibilities: Creating a mechanism to sync the settings of 2 mono instances of the plug-in in order to allow stereo processing - or use a plug-in with stereo output and 4 inputs.
Feeding 2 inputs into the sidechain seems like a workaround for me, since sidechain inputs are usually not used that way. Providing 4 real inputs would be more adequate. But telling customers that they need to switch their host just in order to use your plug-in doesn't seems like good marketing strategy to me. Cubase people have dealt with sidechain processing using real inputs as a workaround for years, before VST3 came out and some people finally started to support it.
My question has been targeted more to logic than the capabilities of the AU-API. Is there a way to use a plug-in with 4 inputs in logic, without having to switch to surround mode (which would make it impossible to use stereo plug-ins on your master and after the plug-in) and not using sidechain as inputs?
On Oct 26, 2010, at 2:19 PM, email@hidden wrote:
> On Oct 25, 2010, at 05:24, Stefan Huber wrote:
>>>> I am working on a cross-plattform plug-in that needs to input 4
>>>> channels and mix them down to Stereo. Most RTAS and VST hosts
>>>> don't seem to have a problem dealing with a stereo plug-in with 4
>>>> inputs.
>>>
>>> i find it generally simpler to always use N-in/N-out terminology to
>>> describe plugins. Do you mean a 4-in/2-out plugin? the AU API has no
>>> issue with such configurations.
>>
>> agreed, but logic switches the output to surround when using a bus
>> or channel with more than 2 outputs. Therefore that would lead to a
>> pretty bad user experience when using a 4-4 plug-in. So I need to
>> keep the plug-in a stereo effect, that uses 4 inputs.
>> Yes, I ment 4-in/2-out.
>>
>>>> However, I did't find a way to use such a plug-in other than
>>>> switching to surround mode and using a 4-4 channel configuration
>>>> in Logic. Is there a way to use a 4-2 plug-in with Logic?
>>>
>>> please don't consider logic to be the only AU host, even though
>>> clearly its the most significant.
>>
>> agreed, but what's the point in developing a plug-in that isn't
>> compatible with the most significant host?
>>
>> Still need input if there is another method to use a 4-in/2-out
>> plug-in other than using the sidechain bus as an input...
> I still do not remember your description of the purpose of your 4-
> to-2 plugin. Without an idea of your purpose for such an odd
> creation, it's really difficult comment on whether there is a better
> way to handle it in Logic. Also, you have to consider that perhaps
> the purpose of your plugin does not fall within the universe of
> things that Logic intends to support, and thus it really doesn't
> matter how popular and significant Logic is, if you don't fit within
> its goals.
>
> For example, I don't understand why you can't have 4 mono channels
> mixed to a stereo bus, or where you expect to get 4-channel signals
> as inputs in Logic. It could be that Logic excludes all plugins
> which do the same thing as yours.
>
> Brian Willoughby
> Sound Consulting
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