Re: (HAL) clock sources
Re: (HAL) clock sources
- Subject: Re: (HAL) clock sources
- From: Jeff Moore <email@hidden>
- Date: Wed, 2 Oct 2002 11:33:58 -0700
On Tuesday, October 1, 2002, at 08:41 PM, Michael Thornburgh wrote:
hi. please forgive the "DUH" nature of this question, but after my
confusion
over data sources, i want to make sure to get this right.
i've never actually seen or played with an audio device with multiple,
settable
clock sources. i assume that, given the presentation of audio samples
by the
HAL, that a device can only have a Device Master Clock Source, which
encompasses
all channels/streams in the record and playback directions, and that
means the
only property address that makes sense is
AudioDevice* channel 0 direction 0
is this assumption correct? i'm not sure exactly what it would mean
if different
channels, streams, or directions on a device could have distinct clock
sources,
but my exposure to pro audio gear is nil.
I would not make that assumption. While it may seem odd at first
glance, but you don't want to tie your hands with respect to what
future hardware may be capable of.
On the other hand, a piece of hardware that did have individual clock
controls on a stream would be a pretty exotic piece of gear.
--
Jeff Moore
Core Audio
Apple
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