DigiDesign HD MADI Guide de l'utilisateur télécharger pdf (Page 94)

Pro Tools|HD User Guide88

Monitoring DSP Usage

The System Usage window provides a display of

DSP usage. With these indicators as your guide,

you can try different mixer setups and different

arrangements of plug-ins, sends, and Auxiliary

Inputs to maximize your use of available DSP

power.

Pro Tools HD also maintains a Plug-in and Mixer

cache for allocated DSP when closing and open-

ing sessions. While this does not change the

time it takes to open the first session after you

launch Pro Tools, it does result in being able to

open and close all subsequent Pro Tools sessions

quickly, especially when using the Revert To

Saved command or when opening similarly con-

figured sessions.

As long as Pro Tools is running, the DSPs will

only be completely purged if you open a session

with a different sample rate or one with differ-

ent Playback Engine settings.

About Processing Bandwidth

Meters in the System Usage window indicate

how much of your system’s processing power is

being used in processing audio, and when writ-

ing and playing back automation.

As these meters approach their limits, native

processing and recording, or playback of auto-

mation data can be affected. If CPU or PCI Activ-

ity are high, a system error may occur. If Disk

Activity is high, Pro Tools may miss playback of

some automation data during particularly dense

periods of activity, such as while using the

Bounce to Disk command.

System Activity Meters

PCI Displays the amount of PCI bus activity.

CPU (RTAS) Displays the amount of CPU pro-

cessing activity for RTAS processing.

CPU (Elastic) Displays the amount of processing

activity for Real-Time Elastic Audio processing.

Disk Displays the amount of hard disk process-

ing activity.

Additional Meters

TDM Voices Allocated Displays the total num-

ber

of TDM voices that can be allocated and the

number of voices currently allocated. This in-

cludes all voices whether they are allocated ex-

plicitly or dynamically, as well as any voices

used for routing RTAS processing.

TDM Time Slots Used Displays the total number

of TDM Time Slots available and the number of

TDM Time Slots currently used.

DSP Usage (HD Accel Core, HD Core, HD Accel,

and HD Process) Displays the percentage of how

much of each DSP chip on each Pro Tools|HD

card is currently being used for mixer configura-

tions and TDM plug-ins.

System Usage window

DSP

Usage

System

Activity

TDM

DSP

Cache

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