Re: More Stereo Mixer component questions
Re: More Stereo Mixer component questions
- Subject: Re: More Stereo Mixer component questions
- From: Bill Stewart <email@hidden>
- Date: Mon, 14 Oct 2002 12:26:49 -0700
on 13/10/02 2:24 PM, Robert Grant wrote:
>
After a bit of a struggle I've got a stereo mixer sitting in my graph:
>
>
AudioUnitGraph 0x9810000:
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Member Nodes:
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node 1: desc aumu dls , instance 0x810000 O I
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node 2: desc mixr smxr, instance 0x810001 O I
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node 3: desc auou def , instance 0x810002 O I
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Connections:
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node 1 bus 0 => node 2 bus 0
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node 2 bus 0 => node 3 bus 0
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Events to be updated:
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CurrentState:
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mLastUpdateError=0, eventsToProcess=F, isRunning=T
What type is:
>
node 2: desc mixr smxr, instance 0x810001 O I
This should be 'aunt'... (in fact, because there isn't a stereo mixer as a
V2 unit in 10.2, all of the units in your graph should have an 'aunt' type -
ie. V1 units), so I'm confused about what is really going on here.
>
Before I added it I was getting sounds coming out. Now there's nothing.
>
I'm trying to
>
add pan control to my app but it's pretty useless without a sound to
>
pan. What have I
>
done wrong? (I haven't fiddled with the volume as I'm happy with the
>
default.)
>
>
As an aside I was adding the default output component with the
>
manufacturer still set
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to the stereomixer, the component was reporting that it loaded
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successfully (returning
>
0) but the graph open & init went kablooie. Shouldn't the load have
>
failed?
Are you checking the result of AUGraphOpen? It should have given you an
error... (if not, I'd love to see your code and fix that bug at least)
>
Perhaps I haven't loaded an 'smxr' at all?
Until you open the graph you don't know if the node you have added is
actually valid or not.. The graph has several states:
(1) Just Nodal Information
(2) Opened - each node opens its AudioUnit as described by the CompDesc
(3) Initialized - the au's are initialized
(4) Running - your output unit has been started
Bill
>
Feeling very unsure about what I'm doing! :-)
>
>
Robert.
>
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