Re: Advice with timing & Audio Units (iOS)
Re: Advice with timing & Audio Units (iOS)
- Subject: Re: Advice with timing & Audio Units (iOS)
- From: IDAS <email@hidden>
- Date: Sun, 17 Aug 2014 00:37:43 +0100
Thanks Kevin, this is helpful.
So this implies that that the master clock is always handled internally by Core Audio?
On 13 Aug 2014, at 20:41, Kevin Dixon <email@hidden> wrote:
> It seems you may be more interested in the property
> kAudioUnitProperty_Latency. As far as I know, time stamps should be
> consistent across channels, etc, as the entire Audio Unit Graph should
> be representing the same point in time.
>
> Given the Latency property, you should be able to compensate by
> delaying other instruments to match the greatest reported latency.
>
> -Kevin
>
> On Wed, Aug 13, 2014 at 12:23 PM, IDAS <email@hidden> wrote:
>> I’ve recently tackled Audio Unit programming and absorbed the documentation
>> on Apples website. Whilst I feel I have a good grasp of everything
>> conceptually, I wanted to check my approach to writing a sequencing app on
>> iOS.
>>
>> So my question is around the timing required to drive the sequencer. When
>> recording or playing back audio (& MIDI), I want to understand the process
>> of synchronising the render callbacks in the Audio Units to my master clock
>> on the device.
>>
>>
>> Audio Units have their own AudioTimeStamp and I wanted to understand more
>> about how this is sourced and how it can also be manipulated to hide
>> latency.
>>
>>
>> Programatically, am I thinking about this correctly?
>>
>>
>> Thanks.
>>
>>
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