Installation guide

Chapter 4: Configuring Core Audio (Mac OS X Only) 27
chapter 4
Configuring Core Audio
(Mac OS X Only)
Avid Core Audio Driver
Capabilities
The Avid Core Audio Driver is a multi-client,
multichannel sound driver that lets Core Au-
dio–compatible applications record and play
back through Pro Tools hardware.
Full-duplex recording and playback of 24-bit
audio is supported at sample rates up to 96 kHz,
depending on your Pro Tools hardware and
CoreAudio client application.
The Avid Core Audio Driver provides up to 64
channels of I/O with the first HDX card in your
system.
Limitations of the CoreAudio Driver
The Avid Core Audio Driver has the following
limitations:
 The Avid Core Audio Driver cannot be used to
preview sound files from the Mac Finder. When
a sound file is located in the Mac OS X naviga-
tion window, a QuickTime transport bar is dis-
played next to it. The QuickTime transport bar
lets you audition the sound file. The sound will
always play back though the Mac’s built-in audio
controller (through the Mac speaker or head-
phone jack). However, if you double-click a
sound file, the QuickTime application will
launch, and can use the CoreAudio Driver for
playback.
 The Avid Core Audio Driver cannot be used
for playback of Mac System Sounds.
The Core Audio Driver does not support
more than the first HDX card in your
system.