Audio Units info?
Audio Units info?
- Subject: Audio Units info?
- From: Marc Poirier <email@hidden>
- Date: Wed, 15 May 2002 08:29:19 -0400
Hi. I've been making software audio effects using the VST standard
for a while & now I am interested in exploring Audio Units. However,
I've had a really difficult time finding any decent information about
the API. I've downloaded the SDK, but all it has are the very
minimally commented base header & source files. There is not even
any description of the basic language used in the API (for example, I
see a lot of reference to "elements" & "components" but I have no
idea what these are in AU-world). And then there are also sources
for a very very simple example Audio Unit (which does nothing but
copy the first audio input channel to the first audio output channel,
& ignore its 2 parameters).
I can't find any useful introductory information or general
documentation of the API. All I've found are couple of very general
paragraphs about Audio Units in some of the CoreAudio overview
information at developer.apple.com.
Am I missing anything? Or is the API just severely underdocumented
at this point? I can't even find any solid intro information about
Audio Units, nothing about how they are handled by the OS or hosts
(do they even need host apps?) or anything like that.
So anyway, if there is some good information out there that I don't
know about, I would greatly appreciate it if someone could point me
towards it. Otherwise, I have a bunch of questions that maybe
someone could answer:
Do music apps have to specifically support Audio Units or is it
handled at the system level?
If specific hosting is required, are there any Audio Unit hosts available?
What are "elements?"
What are "components?"
Is there any documentation written in plain english (rather than C)?
Is there any specific information about Audio Units at
developer.apple.com aside from what's in the very basic CoreAudio
overviews?
Can hosts provide tempo or other time information (measures, meter,
etc.) to Audio Units?
Is it possible for Audio Units to have custom graphic interfaces?
Can Audio Units receive & send MIDI as well as audio?
Is there support for Audio Unit hosts recording automation of an
Audio Unit's parameters?
Can Audio Units have "programs" (as they're called in VST), i.e.
parameter configuration "slots" (or whatever you care to call them)?
Are there any Audio Unit examples out there aside from the "channel
ignorer" example in the SDK?
Thanks very much,
Marc Poirier
--
[ Destroy FX -
http://www.smartelectronix.com/~destroyfx/ ]
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