Re: AU sidechain inputs?
Re: AU sidechain inputs?
- Subject: Re: AU sidechain inputs?
- From: Bill Stewart <email@hidden>
- Date: Tue, 08 Oct 2002 09:28:18 -0700
on 7/10/02 7:24 PM, Brian Willoughby wrote:
>
[ An effect unit is "by convention" required to support only a
>
[ single main input and output bus (elementID) - where elementID ==
>
[ 0
>
[
>
[ Additional busses that maybe found through the BusCount property
>
[ on either or both input and output scopes are presumed to be "side
>
[ chains" for the effect.
>
[
>
[ However, we are not explicit about this - and as the audio unit
>
[ creates the busses for both input and output there is no
>
[ enforceable restriction here about what those busses actually are
>
[ (nor do we want them to be)... Ultimately, what arbitrates a
>
[ connection is whether the format that is published for a given
>
[ bus is provided by the host.
>
[
>
[ One way that we haven't yet implemented (but I think is
>
[ reasonable) to distinguish FOR THE USER the intention of a
>
[ published bus. The AudioUnit would provide names for its busses...
>
[
>
[ Then really it is up to the host to query an AudioUnit on its
>
[ number of in and out busses, and present a way for a user to
>
[ choose which audio goes to/from which in/out bus
>
[
>
[ Does this seem a reasonable solution?
>
>
As long as a bus can be Mono, Stereo, or surround (4, 5.1, 10.2), then this
>
seems very reasonable. An effect with a single bus input of two channels
>
could
>
be considered a "Stereo" effect, while an effect with two inputs busses (even
>
if they're both Mono) would be considered to have a side chain or other
>
non-main input, as explained by the names.
Sure - there's no restriction that the formats of these busses be the same
Bill
--
mailto:email@hidden
tel: +1 408 974 4056
__________________________________________________________________________
"Much human ingenuity has gone into finding the ultimate Before.
The current state of knowledge can be summarized thus:
In the beginning, there was nothing, which exploded" - Terry Pratchett
__________________________________________________________________________
_______________________________________________
coreaudio-api mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/coreaudio-api
Do not post admin requests to the list. They will be ignored.