Apple Logic Pro 7 User Manual download pdf (Page 382)

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382 Chapter 10 Audio Drivers

Note: The set sample rate also applies for recording. As an example, if your audio

hardware supports sample rates up to 48 kHz, but the song is set to 96 kHz, Logic will

generate audio files at 96 kHz. You should be aware that the audio quality is not

improved in the process. The quality of audio is still at 48 kHz, as determined by the

recording hardware, despite the fact that the information is stored in a large 96 kHz file.

Important: Using higher audio sample rates often increases CPU load significantly.

Distributed Audio Processing

Distributed audio processing allows you to expand the processing capacity of your

Logic Pro system by offloading calculations for software instrument and/or DSP effects

to additional G5 Macintosh computers that are connected via Gigabit Ethernet. This is

perfect when using numerous tracks of CPU-intensive software synthesizers or plug-ins,

such as Sculpture or Space Designer.

Additional Macintosh computers do not require further copies of Logic Pro, nor any

MIDI or audio hardware.

You can find the Logic Node installer on the Logic Installation DVD—simply run it and

set the system volume of your Node machine as the destination. Logic Node has no

parameters or GUI elements. It simply needs to be running on the Node machine

before you start Logic Pro.

Note: If you plan to use a Macintosh solely as a “Node machine”, you may wish to place

the Logic Node application in Startup Items. You may also consider the use of Apple

Remote Desktop to control additional Macintosh computers from your primary system.

In this situation, your Node machines don’t need their own monitors or keyboards.

Distributed audio processing actually uses the built-in networking capabilities of

Mac OS X. You will need to set up an Ethernet network connection between all

computers, via the Network pane of the System Preferences. Please consult the Online

Help for details on setting up a network.

Note: You will need to disable the software firewall. Should you wish to access the

Internet via your network, we recommend a hardware firewall or use of a separate

computer with a firewall, as the router.

The primary (“host”) computer can be a single or dual processor G4 or G5 Macintosh,

equipped with a 1 Gigabit Ethernet port. Node machines need one or more G5

processors, and also need to be equipped with a 1 Gigabit Ethernet port (which is

standard on all G5 Macintosh computers).

Should you wish to run multiple nodes, a 1 Gigabit Ethernet switch is required.

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