Re: Output Audio Devices
Re: Output Audio Devices
- Subject: Re: Output Audio Devices
- From: James McCartney <email@hidden>
- Date: Mon, 5 Jan 2004 17:28:54 -0800
On Jan 5, 2004, at 4:42 PM, James Coker wrote:
I'm looking for the type of the kAudioOutputUnitProperty_ChannelMap
property
as discussed below, but don't see anything in the header files,
PublicUtility, AU doc or
list archives. Does anyone know what the type of this property is?
It is an array of SInt32. Each element of the array represents an
output and each integer value corresponds to which input goes to that
output. A -1 value means no input goes to that output, i.e. it will be
silent.
And, does anyone know the relationship between this property, and the
very similar sounding kAudioUnitProperty_AudioChannelLayout?
An AudioChannelLayout is a structure defined in CoreAudioTypes.h which
provides information about the channel ordering of a stream.
AudioChannelLayout tells you, if you have 6 channels of data for
example, whether it is 6.0 or 5.1 and which channels correspond to
which speakers.
Thanks,
Jim
-
james mccartney
apple coreaudio
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