Re: 96 Khz / 24 bit support with HAL?
Re: 96 Khz / 24 bit support with HAL?
- Subject: Re: 96 Khz / 24 bit support with HAL?
- From: Chris Reed <email@hidden>
- Date: Tue, 22 Apr 2003 13:20:35 -0500
On Tuesday, Apr 22, 2003, at 05:07 US/Central, Greg Gant wrote:
I was playing around with 96 Khz, 24 bit sound and noticed fairly
quickly that most apps, including Quicktime, do not support beyond 48
Khz, 16 bit sound. The apps that did support playback of high res
audio didn't. When I was using Peak 3.0, I noticed I was able to
playback sound when using CoreAudio setting but not when using either
of the HAL settings. The HAL (CoreAudio Framework) interfaces with the
Audio Family in the kernel yet its possible to bypass the HAL itself
and access CoreAudio. Also, its noted that CoreAudio supports 96
Khz/24 bit sound as current yet the M-Audio Revolution drivers sport
192 Khz and the checkbox to boot. Also does Quicktime rely on the HAL
system? Lastly, any shareware/freeware apps that I can recommend to
readers that can playback 96 Khz/24 bit sound? Thanks in advance for
to any replies!
The HAL (Hardware Abstraction Layer) _is_ CoreAudio. I don't understand
what you mean by the difference between the two.
The HAL is the part of CoreAudio that provides the interface to
hardware audio devices. There are higher level parts of CoreAudio, such
as AudioUnits, but nothing lower level that user applications can
access.
Also, QuickTime still uses the Carbon Sound Manager (as David Duncan
pointed out). Many games will also still use the Sound Manager.
Although the Sound Manager is implemented on top of CoreAudio (the HAL)
in OS X, it still presents the old limitations to software that uses it.
cheers
-chris
_______________________________________________
coreaudio-api mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/coreaudio-api
Do not post admin requests to the list. They will be ignored.