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Re: looking for AU instrument writer's guide
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Re: looking for AU instrument writer's guide


  • Subject: Re: looking for AU instrument writer's guide
  • From: Murray Jason <email@hidden>
  • Date: Wed, 12 Jul 2006 15:39:58 -0700

On Tue, 11 Jul 2006, Phil Burk wrote:

I cannot find a good overall description of writing AU Instruments. Please
let me know if I have overlooked some great document that explains it all.



Hi Phil,

Unfortunately, no, you have not overlooked some great document that explains it all. The docs and sample apps that you and Bjorn suggest are very good starting points.

In the relatively near future, the doc situation will improve. We'll publish the first version of Audio Unit Programming Guide around the time of WWDC this year. It focuses on effect units. The subsequent version of the document will be expanded and will describe how to write an instrument unit.

-murray

------------------------------------------------------------------------
Murray Jason
Senior Technical Writer
Apple Tech Pubs
408-974-6701


Date: Tue, 11 Jul 2006 20:06:34 -0400 (EDT)
From: Bjorn Roche <email@hidden>
Subject: Re: looking for AU instrument writer's guide
To: Phil Burk <email@hidden>
Cc: "email@hidden" <email@hidden>
Message-ID: <Pine.LNX.4.64.0607112005480.5728@twiggy>
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed

On Tue, 11 Jul 2006, Phil Burk wrote:

Hello,

I am looking for a document that really explains how to build an AU
instrument. I have read the CoreAudio API, the "Turning Up the Volume
with Audio Units" paper, the source code for MusicDeviceBase, etc. I
started with the small SinSinth example, which was crucial.


I cannot find a good overall description of writing AU Instruments. Please
let me know if I have overlooked some great document that explains it all.


I found a set of descriptions for functions like AudioUnitInitialize().
But I am using the MusicDeviceBase class that is not well documented.
Should I be using a lower level API instead?

Hey Phil,

         I don't think this answers your question, but the best
documentation for Audio Unit effects is on your system, not online:

/Developer/Examples/CoreAudio/Documentation/index.html

Maybe they've got something about AU instruments, too. I'm note sure if
this is more than what you've seen already:


/Developer/Examples/CoreAudio/Documentation/AudioUnits/SDK/Classes/ index.html
/Developer/Examples/CoreAudio/Documentation/AudioUnits/SDK/Classes/ MusicDeviceBase_fs.html


I don't know why that info isn't online.

         bjorn

-------------
Bjorn Roche
Check out my CD Mastering Software
for Mac OS X : http://www.xowave.com

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