Re: Latency
Re: Latency
- Subject: Re: Latency
- From: Gregory Wieber <email@hidden>
- Date: Tue, 28 Dec 2010 16:39:44 -0800
When I first started researching this issue, I may have become attached to the notion of asking the audio unit for its latency, do to the existence of the prestantionLatency property -- which I later realized was OS X only. My earlier discovery of the presentationLatency property may have biased me to believing that the Audio Units held the correct information, and I completely ignored anything to do with the Audio Session...
Taking another look, I just realized that the audio session has a CurrentHardwareOutputLatency property, and I'm going to explore that and see if I can get somewhere.
On Tue, Dec 28, 2010 at 4:30 PM, Gregory Wieber
<email@hidden> wrote:
Final delivery is through a RemoteIO Audio Unit -- which, if my understanding is correct, is the closest thing we have to the HAL on iOS...
I understand that those numbers are likely correct, I was just being thorough.
On Tue, Dec 28, 2010 at 4:26 PM, Paul Davis
<email@hidden> wrote:
On Tue, Dec 28, 2010 at 7:18 PM, Gregory Wieber <
email@hidden> wrote:
> Ok, so no luck. First, kAudioUnitProperty_PresentationLatency is Mac OS
> X only. Second, kAudioUnitProperty_Latency keeps returning 0.
there's no particular reason why the AUs you've mentioned would add
any latency to the signal pathway ....
the real latency numbers that you appear to need are from the HAL. how
are you arranging for final delivery to the audio h/w?
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