Phonic FIREFLY 808 UNIVERSAL Manual Del Usuario página 13

Input Channels
The Input Channels section allows users to view and edit the
name of the various input channels received from the FireWire
or USB interface. For a list of default channel names, please
consult the table on page 11.
Output Channels
By entering the Output Channels section, users can view
and edit the names of the various output channels from the
computer to the Firefly 808 Universal.
Synchronization
In the Synchronization section, users can adjust the sampling
rate and other synchronization properties. Many of these
adjustable properties, as they are, are set for optimum
performance and, unless you are sure of what you need to
change, are probably best left alone.
First off, the sync mode can be altered, though making this
alteration is not recommended for novice users. The sync mode
is basically the way the computer determines what the 'clock
source' (ie. device that your computer will use to determine the
timing of all digital signals received) will be. The default setting
for this feature is "CSP," meaning the Firefly is the "master"
clock source of the device. The other options allow users to
make the FireWire follow the "timing" of whichever device is
the clock source. Having two clock sources has the potential
to create very undesireable results, so it is best avoided. If the
Firefly is the only piece of digital audio equipment attached to
the computer, there is no reason this option should be changed.
Users are also able to change between automatic and manual
sampling rate settings. When the sampling rate is manually set,
users can select between sampling rates of 44.1, 48.0, 88.2,
96.0 and 128 kHz per second for analog inputs and 176.4 and
192.0 kHz per second for some digital devices. Many devices
have sampling rates that do not surpass 44.1 kHz per second,
therefore, when using multiple digital devices, users are advised
not to exceed this level unless they are sure the secondary
device's sampling rate can.
FIREFLY 808 UNIVERSAL
Settings
Users are able to adjust various buffer times in the Settings
section.
The Stream Buffer Depth is adjustable between 0.5 and 20
milliseconds. It adjusts the buffer used when streaming a signal
from the Firefly. If the depth is set too high, an obvious latency
will become evident. If the depth is too low, various clicks and
pops may become obvious. It is best to set the Stream Buffer
Depth to a level that allows users to get the lowest latency,
while still maintaining an optimal performance. The default
settings are ideal for most computers.
The ASIO Buffer Depth is adjustable between 4 and 40
milliseconds. This allows users to adjust the latency of the
stream received by ASIO driver-based software (including
Steinberg Cubase LE 4).
The WDM (Windows Driver Model) Sound Buffer Depth is
adjustable between 4 and 40 milliseconds. This allows users
to adjust the latency of the stream received by WDM based
programs.
Also in this section, users are able to view their "drop out
statistics", where the number of times the FireWire connection
has been interrupted can be viewed.
Streams
In the Streams section, the Firefly device properties can be
viewed. Each input and output stream can be scrutinized, and
the isochronous stream number and its supported sampling
rates can be viewed.
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