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Re: bus count and channel info confusion
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Re: bus count and channel info confusion


  • Subject: Re: bus count and channel info confusion
  • From: Stefan Gretscher <email@hidden>
  • Date: Mon, 26 Jul 2004 15:28:34 +0200

Am 23.07.2004 um 21:25 schrieb William Stewart:
For example. Lets say that I have an effect that can be set to any num channels in to out as long as they are the same (this is the default for most effects).

Now, I have a 6 channel stream.. Somewhere above my effect that stream has some kind of surround/spatial characteristic. But the effect doesn't know about this - it just takes 6 channels in and outputs 6 channels.

It does NOT support the AudioChannelLayout property. It doesn't need to because it is just processing channels with no implications to if of where those channels are spatially.
But isn't that exactly what old Logic multichannel does: processing 6 (or 8) channels on one bus without any spacial information?
I don't understand the conflict with Pavol's suggestion here.

Therefore, we've specified that support of the ACL is optional and should only be supported by those AU's that are doing something based on spatial locations.
According to this statement, what is the problem with the old Logic mode:
one bus, 8 outs on that bus, no spacial info = 8 plain channels.
In what way does this conflict with the specs?

I guess you could argue that an AU Instrument is generating audio and typically not processing it, so if it is outputting more than 2 channels it is likely to be doing so with some spatiality assumed. But I'm loathe to make this a rule...
Old Logic mode does not assume spaciality, it's using 8 equally handled channels.
So in my opinion we are not creating a new rule here but follow the existing ones.

Best,

Stefan Gretscher

plug-in development & 3rd party plug-in support
Emagic Soft- & Hardware GmbH
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  • Follow-Ups:
    • Re: bus count and channel info confusion
      • From: William Stewart <email@hidden>
References: 
 >bus count and channel info confusion (From: Frank Hoffmann <email@hidden>)
 >Re: bus count and channel info confusion (From: Marc Poirier <email@hidden>)
 >Re: bus count and channel info confusion (From: Chris Reed <email@hidden>)
 >Re: bus count and channel info confusion (From: Pavol Markovic <email@hidden>)
 >Re: bus count and channel info confusion (From: Stefan Gretscher <email@hidden>)
 >Re: bus count and channel info confusion (From: Pavol Markovic <email@hidden>)
 >Re: bus count and channel info confusion (From: Stefan Gretscher <email@hidden>)
 >Re: bus count and channel info confusion (From: Pavol Markovic <email@hidden>)
 >Re: bus count and channel info confusion (From: William Stewart <email@hidden>)

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