I'm afraid I can't yet provide a lot of details; I'm trying to
remotely troubleshoot some problems a user is reporting, and don't
have much reliable/specific information yet. When asked to report
any errors logged to the console that's the only one that had been
logged at the time.
For what it's worth, the reported bug is that my application is often
introducing a delay (up to a 1/2 second or so) before audio starts to
play back. However, this code has been in use "in the wild" for some
time, and this is the first instance of this particular behavior
being reported. The kAudioHardwareIllegalOperationError is certainly
not something I've ever seen before, and I was also very puzzled by it.
Other strange behavior he's reported makes me a little suspicious of
the overall health of his machine, e.g. his preferences file appears
to have suffered a bout of spontaneous corruption.
I will certainly let you know if I am able to extract more useful
details.
Thanks much for such a quick response,
Christopher
The usual cause for this sort of error is that an IOProc hasn't be
added with AudioDeviceAddIOProc prior to being started with
AudioDeviceStart. I presume that you are using an instance of AUHAL
to handle the IO, so I'm somewhat puzzled how something like this
might have come up.
Perhaps you could explain a bit more about the problem?
On Mar 22, 2007, at 6:44 PM, Christopher Ashworth wrote:
What are the reasons that AUGraphStart might return
kAudioHardwareIllegalOperationError?
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