Specifications

Chapter 2: Windows Configuration 23
DAE Playback Buffer Size
The DAE Playback Buffer Size determines the
amount of memory DAE uses to manage disk
buffers, which affects system performance.
◆ Higher DAE Playback Buffer Size settings can
allow for a higher density of edits in a session.
However, a higher setting can cause a time lag to
occur before playback or recording begins. It can
also cause a time lag to occur when you are ed-
iting during playback.
◆ Lower DAE Playback Buffer Size settings can
improve playback and recording initiation
speed. However, a lower setting can make it dif-
ficult for slower hard drives to play or record
tracks reliably.
To change the DAE Playback Buffer Size:
1 Choose Setups > Playback Engine.
2 From the DAE Playback Buffer pop-up menu,
select a buffer size. Memory requirements for
each setting are shown at the bottom of the
Playback Engine dialog box.
3 Click OK.
If Pro Tools needs more system memory for the
DAE Playback Buffer, it will prompt you to re-
start your computer.
Pro Tools Hardware Settings
Pro Tools lets you set the default sample rate
and clock source for your system, as well as a
range of controls specific to each type of audio
interface.
Default Sample Rate
The Sample Rate setting appears as the default
sample rate when you create a new session.
(This setting is available in the Hardware Setup
dialog only when no session is open.)
To change the default Sample Rate:
1 Make sure that no Pro Tools session is open.
2 Choose Setups > Hardware Setup.
3 Choose the sample rate from the Sample Rate
pop-up menu.
4 Click OK.
Clock Source
The Pro Tools Hardware Setup dialog allows you
to select the Clock Source for the system.
Internal If you are recording an analog signal di-
rectly into Pro Tools, you will usually use the
Pro Tools Internal clock source. The Clock
Source automatically changes to Internal when
you change the Ch. 1–2 Input to Analog.
Digital If you are transferring material into
Pro Tools from an external digital device, you
will usually synchronize Pro Tools to that digital
device. The Clock Source automatically changes
to the corresponding digital format when you
change the Ch. 1–2 Input to a digital format.
Playback Engine dialog for Pro Tools MIX system
You can change the sample rate when creat-
ing a new Pro Tools session by selecting a
different sample rate in the New Session di-
alog. (See
“Starting a Session” on page 55.)