Re: Slow audio device starting on Lion?
Re: Slow audio device starting on Lion?
- Subject: Re: Slow audio device starting on Lion?
- From: Dave Fernandes <email@hidden>
- Date: Mon, 02 Jan 2012 15:11:05 -0500
Sounds like a known problem on both Mac OS and iOS:
http://lists.apple.com/archives/coreaudio-api/2010/Jun/msg00308.html
http://osdir.com/ml/coreaudio-api/2011-01/msg00043.html
Perhaps it is a power-saving feature, as Shaun Guth suggests.
Dave
On 2012-01-02, at 1:49 PM, Jeff Johnson wrote:
> 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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