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Slow audio device starting on Lion?
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Slow audio device starting on Lion?


  • Subject: Slow audio device starting on Lion?
  • From: Jeff Johnson <email@hidden>
  • Date: Mon, 02 Jan 2012 12:49:36 -0600

I'm calling AudioDeviceCreateIOProcID() and then AudioDeviceStart(). In my tests, I'm using the built-in output device. On some (but not all) machines running Lion, I'm seeing a half a second delay between the time AudioDeviceStart() returns and my AudioDeviceIOProc first gets called. I've never seen nearly this long of a delay with Snow Leopard and earlier. What would cause the delay, and is it to  be expected? I know that Core Audio has changed fundamentally in Lion, so I'm wondering if that has something to do with it.

-Jeff

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