Specifications

Chapter 11: Record Setup 143
You can reduce the amount of monitoring la-
tency for Pro Tools LE systems by reducing the
H/W Buffer Size. However, even at the smallest
buffer size, there is still some latency. In addi-
tion, reducing the buffer size limits the number
of simultaneous audio tracks you can record
without encountering performance errors.
While there may be times when you want a
larger buffer size, for the sake of higher track
counts with more plug-ins, you’ll generally
want a smaller buffer size when recording audio
that is monitored through your Pro Tools LE
system.
If you are monitoring the recording source with
an external mixer, before it is routed to
Pro Tools, you will not hear any latency.
To set the Hardware Buffer Size:
1 Choose Setups > Playback Engine.
2 Choose the number of samples from the H/W
Buffer Size pop-up menu.
3 Click OK.
Zero Latency Monitoring
(Mbox Only)
Mbox gives you the ability to monitor your an-
alog input signals while recording, without
hearing any latency. This zero-latency analog
monitoring is controlled by the Mbox front
panel Mix knob, which you can use to blend
and adjust the ratio between the Mbox analog
input and Pro Tools playback. For more infor-
mation, refer to the Mbox Basics Guide or the
Getting Started with Mbox Guide.
Low Latency Monitoring
(Digi 002, Digi 002 Rack, and Digi 001 Only)
Digi 002, Digi 002 Rack, and Digi 001 systems
can use the Low Latency Monitoring option to
record with an extremely small amount of mon-
itoring latency, to as many tracks as each system
supports.
To use Low Latency Monitoring:
1 Record enable audio tracks by clicking their
Record Enable buttons. Only tracks with inputs
set to an audio interface (not a bus) use Low La-
tency Monitoring.
2 From the Output Selector, assign each track to
either Output 1 or Output 2. Only tracks as-
signed to these outputs use Low Latency Moni-
toring.
3 Select Operations > Low Latency Monitoring.
When Low Latency Monitoring is enabled, any
plug-ins and sends assigned to record-enabled
tracks (routed to Outputs 1–2) are automatically
bypassed, and must remain bypassed. Also,
these tracks will not register on meters for Mas-
ter Faders.
Low Latency Monitoring and
Bounce To Disk
With Low Latency Monitoring enabled, only au-
dio tracks are included with the Bounce To Disk
command—Auxiliary Input tracks are ignored.
To include any Auxiliary Inputs’ audio when
bouncing to disk, Auxiliary Inputs must be re-
corded to new audio tracks (see “Recording to
Tracks” on page 481.)
Computers with slower CPUs may not be
able to use the 128 buffer size without en-
countering performance errors.