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Re: Audiounit I/O Buffer Size
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Re: Audiounit I/O Buffer Size


  • Subject: Re: Audiounit I/O Buffer Size
  • From: Brian Willoughby <email@hidden>
  • Date: Tue, 29 Jan 2008 20:47:02 -0800

This raises an important question (in my mind, at least): If the user sets a particular buffer size in a DAW such as Logic, does it really matter what the hardware buffer size is? Wouldn't having too large of a buffer in Logic defeat any advantage you might have in your AU by using a smaller buffer based on the hardware? In other words, I am thinking that all you need to know is the buffer size that the DAW will use for your AU. Anything beyond that cannot be taken advantage of, unless I am missing some detail...

Brian Willoughby
Sound Consulting


On Jan 29, 2008, at 05:39, Jankoen de Haan wrote:
I wish I could get hold of the Hardware buffer size from within a audio unit. I know I should not be dependen on this and that I should use de GetMaxFramesPerSlice to setup my buffers.
But.... I would really like this value so I can minimize the latency of my plugin. Since I use convolution in my audiounit, I always have to optimize between latency en CPU heaviness.


I would like to implement some buffer size adapting internally to the plugin (like I did for RTAS) to make sure that the plugin performs in the best way I can imagine. So when the track of the audiounit switches to be "live" it performs with lowest latency that makes sense. The only value I really would to get a hold of is the I/O buffer size as set in the preferences panel of Logic.

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