96 Khz / 24 bit support with HAL?
96 Khz / 24 bit support with HAL?
- Subject: 96 Khz / 24 bit support with HAL?
- From: Greg Gant <email@hidden>
- Date: Tue, 22 Apr 2003 03:07:28 -0700
First off, forgive me if this is the question steps outside the
parameter of the CoreAudio mailing list but I'm not sure where else to
ask the follow.
Right now I'm writing a review for the M-Audio Revolution 7.1 Audio
card for insidemacgames.com but while I was toying with this card I
suddenly was presented with some issues and I wanted to get my facts
straight. I surfed some tech docs which mostly went over my head pretty
quickly (I'm not an OS X dev), the but here's what I understand,
correct me if I'm wrong.
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!
From
Greg Gant
email@hidden
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