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iPhone remoteIO AUGraph
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iPhone remoteIO AUGraph


  • Subject: iPhone remoteIO AUGraph
  • From: "Raleigh F. Rinehart" <email@hidden>
  • Date: Mon, 22 Jun 2009 16:35:45 -0500

Hi All,
I am new to coreAudio (and iphone) programming so let me apologize in advanced if I mess up the terminology.
I am working on iPhone app that makes extensive use of audio. It will have multiple WAV files playing simultaneously and each audio stream should be independently controllable (i.e. start, stop, volume, pan, etc).


I am building upon some examples I've found on the web, notably http://michael.tyson.id.au/2008/11/04/using-remoteio-audio-unit/ and
http://sites.google.com/site/iphoneappcoder/iphone-wav-file-playback.


Basically what I have are multiple AUGraphs each with a RemoteIO output unit and a Multi channel mixer unit. Basically one graph per Wav file.

This seems wrong to me, I have the nagging feeling that I should have one AUGraph with each stream going through that. Would that be better? If so how would that be accomplished, would I need to add multiple mixer nodes for each file, each with its own callback. Or is there someway to utilize a single callback to fill all the buffers? In either case I think I would need multiple nodes/audio units so that each one can be controlled independently.

Any, thoughts, suggestions, pointers to example code would be very much appreciated!

thanks,
-raleigh



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