Apple Logic Pro 7 (TDM Guide) - Manual (Page 11)

Chapter 1 Audio Hardware and Drivers 11
Important: In order to change tracks to or from DAE/TDM, always switch Universal
Track Mode off, and work with split stereo or mono files. Also be aware that DAE/TDM
does not currently work with interleaved stereo files. If your tracks need to be switched
between DAE/TDM and other systems, split stereo files should be used. To do so,
enable the
Preferences > Audio > General > Force record & convert interleaved into split
stereo file(s) parameter.
Please reboot Logic after changing the Universal Track Mode setting.
Larger Disk Buffer
This option influences the amount of audio data that is read from the disk in advance.
It is switched off by default, matching the demands of fast hard drives and powerful
computers. If you encounter frequent error messages while running Logic, you should
switch this setting on. This will allow you to play back more tracks, achieving higher
reliability. Please note that RAM requirements are increased if this option is active.
24 Bit Recording
When this setting is active, Logic can record 24 bit files. Please keep in mind that this
only makes sense if you are actually using a 24 bit interface. As long as your audio
hardware is capable of this bit depth, you can select this option in the
Audio > Audio
Hardware & Drivers window.
24 bit recordings offer a significant improvement in the available dynamic range, but
require high quality peripheral components such as; microphones, preamplifiers, and
high quality AD/DA converters. 24 bit files use one and a half times more disk space
than comparable 16 bit files.
Note: More information about the use of bit depths, can be found in the following
section.
Software Monitoring
This option allows you to switch Software Monitoring (listening to the actual input
signal) on or off. Please note that with Software Monitoring active, the audio signal is
processed via Logic—so a certain amount of audible delay (commonly referred to as
latency) is inevitable—although this may be so small that it can’t be heard. If you are
listening to the recording signal through your mixing desk, or your audio hardware
supports hardware monitoring, you should switch this option off.
The decision to switch Software Monitoring on, or to listen to the incoming signal as
output by your (analog) mixing desk, depends on the latency time that can be
achieved with the system.