Re: Apple Loop IFF extensions?
Re: Apple Loop IFF extensions?
- Subject: Re: Apple Loop IFF extensions?
- From: James McCartney <email@hidden>
- Date: Mon, 13 Oct 2003 11:26:13 -0700
on the subject of AIFF chunks:
In Panther, CoreAudio defines a new chunk type 'CHAN' which contains an
AudioChannelLayout struct that describes the channel layout of a file.
This is how CoreAudio and later QuickTime will describe multichannel
files in a flexible and unambiguous manner.
The structs are defined in <CoreAudio/CoreAudioTypes.h>. There are
functions in <AudioToolbox/AudioFile.h> to get and set these structs in
AIFF files. There are functions to manipulate these structs in
<AudioToolbox/AudioFormat.h> .
On Oct 13, 2003, at 9:03 AM, Evan Olcott wrote:
on 10/13/03 10:03 AM, Matthew Xavier Mora at email@hidden wrote:
tom erbe has a link to some descriptions:
<http://music.calarts.edu/~tre/AIFFC/>
Matt
Thanks, but those are compressed file format headers for AIFC.
Better docs for IFF chunks in general is here:
http://www.borg.com/~jglatt/tech/miditech.htm
I'm talking about the 'basc', 'trns', and 'cate' chunks that the Apple
Loop
IFF extensions add. I'm assuming they're "basic information",
"transient
list", and "category", as well as a bunch of JUNK chunks for some
reason.
Anyhow, I really don't want to take the time to reverse engineer these
and
assume the wrong things...
-
james mccartney
apple coreaudio
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