DigiDesign Digidesign Pro Tools 8.0, Reference Manual

Page: 67 / 1112

Chapter 5: System Setup 49
Large
Improves performance when using Elastic
Audio features, but it also decreases the amount
of memory available for other system tasks, such
as RTAS processing.
To change the Cache Size:
1
Choose
Setup > Playback Engine
.
2
From the
Cache Size
pop-up menu, select a
disk cache size.
3
Click
OK
.
System Memory Allocation
(Pro Tools HD Only)
When you start your computer, Pro Tools auto-
matically reserves a portion of system memory
for the DAE Playback Buffer. This reserved mem-
ory is unavailable to other applications, even if
Pro Tools is not running.
You can set Pro Tools to reserve only the mini-
mum amount of required memory, so that more
system memory is available to other applica-
tions.
To minimize system memory allocation:
1
Choose
Setup > Playback Engine
.
2
Select the Minimize System Memory Allocation
option.
3
Click
OK
.
4
Do one of the following:
• On Windows systems, restart your com-
puter.
– or –
• On Mac systems, if prompted, enter your
password, then restart your computer.
Plug-in Streaming Buffer Size
(Structure Plug-in Only)
This setting appears in the Playback Engine dia-
log only if the Structure Professional Sampling
Workstation plug-in is installed on your system.
The
Plug-in Streaming Buffer Size
setting deter-
mines the amount of memory DAE allocates for
streaming playback from disk with the Structure
plug-in. This setting only affects playback if disk
streaming is activated in Structure’s plug-in con-
trols (see the
Structure Plug-in Guide for more in-
formation).
The optimum
Plug-in Streaming Buffer Size
for
most sessions is
250 ms; Level 2 (Default)
.
•
Plug-in Streaming Buffer Size
settings lower
than 250 ms; Level 2 (Default) reduce the
amount of system memory used for sample
playback and frees up memory for other sys-
tem tasks. However, reliability of sample play-
back may decrease.
Using a larger Cache Size leaves less system
memory for other tasks. The default setting
of Normal is recommended unless you are
encountering -9500 (“Cache too small”)
errors.
Cache Size menu in the Playback Engine dialog