MOTU UltraLite AVB User Manual page 56

playback is extremely precise, it is only the
monitoring of your live input signal which may be
delayed.
Adjusting your host software audio buffer
Buffers are small bundles of audio data. The
UltraLite AVB "speaks" to your computer in
buffers, rather than one sample at a time. The size
of these buffers determine how much delay you
hear when monitoring live inputs through your
audio software: larger buffers produce more delay;
smaller buffers produce less.
Adjusting buffer size on Mac OS X
Under Mac OS X, audio I/O buffer size is handled
by the host audio application (not by the UltraLite
AVB's Core Audio driver). Most audio software
applications provide an adjustable audio buffer
setting that lets you control the amount of delay
you'll hear when monitoring live inputs or
processing them with software plug-ins. Here are a
few examples.
Figure 7-4: In Digital Performer and AudioDesk, choose Setup menu>
Configure Audio System> Configure Hardware Driver to open the
dialog shown above and access the Buffer Size setting. Refer to your
Digital Performer or AudioDesk manual for information about the
Host Buffer Multiplier setting.
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Figure 7-5: In Cubase or Nuendo, choose Devices menu > Device
Setup. Select your interface (UltraLite AVB), then click the Control
Panel button to access the window above and the Buffer Size setting.
Figure 7-6: In Logic Pro, go to the Audio Driver preferences to access
the Buffer Size option shown above.
Adjusting buffer size on Windows
To adjust buffer size on Windows, visit the MOTU
AVB USB Control Panel. See "MOTU AVB USB
Control Panel" on page 28.
Lower latency versus higher CPU overhead
Buffer size has a large impact on the following:
Monitoring latency
■
The load on your computer's CPU
■
W O R K I N G W I T H H O S T A U D I O S O F T W A R E