Re: goodbye kAudioDevicePropertyRateScalar
Re: goodbye kAudioDevicePropertyRateScalar
- Subject: Re: goodbye kAudioDevicePropertyRateScalar
- From: Christopher Penrose <email@hidden>
- Date: Tue, 13 Nov 2001 11:23:36 +0900
Thanks!
I was dense and I now understand that the channel configurations are
treated as independent devices on the Delta 1010. Thanks again!
Christopher
email@hidden
On Tuesday, November 13, 2001, at 04:01 AM, Jeff Moore wrote:
on 11/12/01 9:09 AM, Christopher Penrose <email@hidden> wrote:
I am working with a multi-channel audio device and it has several
channel modes that I can select from. It has a comprehensive
10-channel
mode, and five other stereo paired choices. I haven't seen a way to
divine such possibilities with CoreAudio
Bill is correct. All the the information you need is available from the
stream description related properties, especially
kAudioDevicePropertyStreamFormats which returns the list of available
stream
formats.
You sound like you are working with an M-Audio card. When I run Daisy
in our
lab with a Delta 10/10, I see 7 individual devices:
- a 2 channel input only Mixer device
- a 2 channel full duplex SPDIF device
- 4 2 channel full duplex devices addressing 4 stereo pairs of analog
IO
- a 10 channel full duplex device
In each of these devices, I only see one kind of channel configuration
and
bit depth with many different sample rates. Apparently M-Audio has
chosen to
implement the different channel configurations as separate individual
devices, an interesting approach.
All of this info is correctly conveyed via the stream format properties.
--
Jeff Moore
Core Audio
Apple
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