Re: Sample-accurate parameter automation? Possibe at all with AUs?
Re: Sample-accurate parameter automation? Possibe at all with AUs?
- Subject: Re: Sample-accurate parameter automation? Possibe at all with AUs?
- From: Jeremy Sagan <email@hidden>
- Date: Tue, 11 Mar 2008 12:18:03 -0400
Take a look at AudioUnitScheduleParameters.
Hosts like Metro call this to schedule sample accurate parameter
automation. What the AU does with it is, of course, up to the AU.
Jeremy Sagan
Sagan Technology
www.sagantech.biz
On Mar 11, 2008, at 6:00 AM, Greg X wrote:
Hi!
I want to support sample-accurate parameter automation
of my MusicDeviceBase based AU.
All of the examples I saw are calling GetParameter
once at the beginning of the render process. ..which
is very far from being accurate.
Are there some kind of parameter buffers? Like the
input buffers for incoming audio.
I feel uncomfortable with calling series of
"GetParameter"s for each sample. It feels to be a huge
performance hit to the DSP. Why not using parameter
buffers instead?
I'm also wondering why are all of those examples using
such an inaccurate parameter handing? (when someone is
using 512 samples long processing buffers, it doesn't
mean that he wants to get inaccurate parameter
handing)
Are hosts providing such inaccurate parameter
automation, or what is the reason?
Thanks for your time,
Greg1X
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