AUHAL + Device Latency
AUHAL + Device Latency
- Subject: AUHAL + Device Latency
- From: Dominic Feira <email@hidden>
- Date: Tue, 15 Jul 2008 16:51:15 -0400
I find myself having to synchronize the audio from multiple input devices. I am full aware of aggregate devices, but for reasons I'd rather not get into I can't use them.
Which leads me to my questions.
All of the time stamps that I get from the AUHAL have a rate scalar of 1. This doesn't seem right. Do I need to talk to the device directly to get it?
Does the AUHAL do anything to compensate for latency?
How does kAudioUnitProperty_Latency relate to kAudioDevicePropertyLatency and kAudioStreamPropertyLatency?
Does AudioDeviceTranslateTime take latency into consideration at all?
After having to go through this, I highly recommend everybody use aggregate devices when possible. Synching devices really isn't any fun.
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