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Error Instantiating OutputUnit
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Error Instantiating OutputUnit


  • Subject: Error Instantiating OutputUnit
  • From: Joe White <email@hidden>
  • Date: Thu, 04 Jul 2013 16:41:06 +0100

Hi list,

I've (now regrettably) installed the Xcode 5 developer preview and found that code that once worked a few months ago is now failing. 

Essentially when I try to instantiate any AudioComponent with 'AudioComponentInstanceNew()' I get an OSStatus return of -1

    "Mac OS error -1 (dsNoExtsMacsBug): not a SysErr, just a placeholder"

I created a test project to that literally just gets the component description and tries to instantiate it. Here's the main code and the project itself:

http://pastebin.com/76igRsu2

https://www.dropbox.com/s/eo6iajukgbybrq8/AudioTest.zip

I ran the project on a colleagues machine who hasn't updated and it built and ran fine, so my hunch is it has something to do with a change in the CoreAudio framework/headers? (Running the project in Xcode 4.6.3 on my machine equally doesn't work). 

In the Additional Downloads section https://developer.apple.com/downloads/index.action on the developer site I noticed there's a 'Audio Tools for Xcode 5 Developer Preview - June 2013'  which states that it includes the CoreAudios headers but annoyingly only AULab and HALLab are present in the download, I'm not sure if that's a mistake or the headers are to be found elsewhere. 

If anyone has any ideas on where I'm going wrong I'd love to hear as I'm pretty stumped right now. I not sure if I can 'revert' back to just Xcode 4 only or if I'm missing some updated files from somewhere. 

(System info: MBP running OS X 10.8.4, Xcode 4.6.3 and Xcode 5-DP2)

Many thanks,
Joe 
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