Re: AudioDevice AudioChannelLayout
Re: AudioDevice AudioChannelLayout
- Subject: Re: AudioDevice AudioChannelLayout
- From: Jason <email@hidden>
- Date: Thu, 23 Oct 2003 15:13:00 -0500
Hi Jeff,
Does Audio MIDI Setup in Panther have more features than in Jaguar? I
have a 4-channel output device (it has two stereo output jacks). In
AMS it shows the 4 separate channels, however the "Current Format"
pop-up menu only shows various '1Ch' options like "1Ch-48000.0 Hz-32
bit". The System Preferences' sound pane only lists the output device
once, which is only the first two channels as a stereo pair. What I
want is for two stereo pairs to appear in the System Preferences sound
pane, the first routing to Ch1/2 and the second routing to Ch3/4. This
would allow also QuickTime multi-channel apps (that use the Sound
Manager via HAL) to use the two stereo outputs of this device. Is
there some hidden feature that would allow me to map/indicate the
channel layout I want? Or is this something new in Panther's AMS?
(I'll test that tomorrow if I'm lucky!)
Thank you,
Jason
From: Jeff Moore <email@hidden>
I agree that the driver should be able to inform the HAL about what the
channelization is. Sometimes it knows and at the very least it could
provide a reasonable default that the User can override in AMS. Such
support would make a good future direction for the IOAudio family.
On Wednesday, October 22, 2003, at 12:54 PM, Jeff Moore wrote:
The User is the only one who can say how they wired up their system
and want it to be used. Consequently, one needs to use Audio MIDI
Setup to indicate the channel layout of an audio device to the system
before it can be reported back through the HAL.
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