Tascam PCI-822 User Manual page 34

— Hardware buffer size —
The PCI-822 card has a programmable hardware buffer size in the
System tab of its control panel. The Buffer Size setting controls how
many audio samples are transferred at a time between the card and
your computer's motherboard.
In general, the default setting (256 samples) is recommended, but
sometimes increasing this buffer size will eliminate glitches due to the
behavior of another device on the PCI bus. Before changing the
Buffer Size setting, shut down any open audio applications.
— Software buffer size —
Each software application has its own mechanism for adjusting the
buffer sizes that the application uses to send and receive blocks of
sample data from the audio card's driver. These settings can have a
dramatic effect on a variety of factors, such as the maximum number
of tracks your system can record/play, and the latency of on-screen
fader changes. Using a larger buffer size reduces the likelihood of
glitches, and increases the delay between an on-screen change and
its audible effect.
Consider the recommendations of the audio software manufacturer,
and then experiment with these settings. The goal is a balance
between the low latency afforded by a small number of relatively small
buffers, and the safety of a large number of large buffers.
— Too many tracks —
Depending on the audio application you're using, you may get clicks
and pops if you're trying to run more audio tracks than your system
can comfortably handle. You can test this by copying a "problem"
project and then removing some tracks from the copy. If the reduced
project then plays without problems, try defragmenting your hard
disk. If the problem persists, make sure you've explored the other
causes of clicks and pops described in this chapter before rushing out
to buy a new hard disk or system.
PCI-822 User's Guide 31