Chapter 4: Configuring Your Pro Tools System 19
RTAS Error Suppression Options
Ignore Errors During Playback/Record When en-
abled, Pro Tools continues to play and record
even if the RTAS processing requirements ex-
ceed the selected CPU Usage Limit. This can result
in pops and clicks in the audio, but does not
stop the transport.
Minimize Additional I/O Latency When enabled,
any additional latency due to suppressing RTAS
errors during playback and record is minimized
to 128 samples. Suppressing RTAS errors re-
quires at least 128 samples of additional buffer-
ing on some systems. If this option is disabled,
the buffer is half the H/W Buffer Size, or at least
128 samples (whichever is greater). If you are on
an older, slower computer, you may want to dis-
able this option to avoid adverse performance.
This option is only available if the Ignore Errors
During Playback/Record option is enabled.
DAE Playback Buffer Size
The DAE Playback Buffer Size setting determines
the amount of memory DAE allocates for disk
buffers. In addition to levels, the DAE Playback
Buffer Size shows values in milliseconds, which
indicate the amount of audio buffered when the
system reads from disk.
The optimum DAE Playback Buffer Size for most
disk operations is 1500 msec; Level 2 (Default).
• DAE Playback Buffer Size settings lower than
1500 msec; Level 2 (Default) may improve
playback and recording initiation speed, as
well as preview in context in DigiBase brows-
ers. However, a lower setting may make it dif-
ficult to play or record tracks reliably with
sessions containing a large number of tracks
or a high density of edits, or with systems that
have slower or heavily-fragmented hard
drives.
• DAE Playback Buffer Size settings higher than
1500 msec; Level 2 (Default) allow higher track
count, higher density of edits in a session, or
the use of slower hard drives. However, a
higher setting may increase the time lag when
starting playback or recording, starting pre-
view in context from DigiBase browsers, or
cause a longer audible time lag while editing
during playback.
To change the DAE Playback Buffer Size:
1 Choose Setup > 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.
3 Click OK.
If Pro Tools needs more system memory for the
DAE Playback Buffer, it will prompt you to re-
start your computer.
Using a larger DAE Playback Buffer Size
leaves less system memory for other tasks.
The default setting of 1500 msec (Level 2) is
recommended unless you are encountering
–9073 (“Disk too slow or fragmented”)
errors.
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