Phonic Firefly 808 Universal User Manual page 15

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 digi-
tal 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.
Settings
Users are able to adjust various buffer times in the Set-
tings section.
The Stream Buffer Depth is adjustable between 0. and
20 milliseconds. It adjusts the buffer used when stream-
ing 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 al-
lows users to get the lowest latency, while still maintaining
an optimal performance. The default settings are ideal for
most computers.
FIREFLY 808 UNIVERSAL
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 (in-
cluding Steinberg Cubase LE 4).
The WDM (Windows Driver Model) Sound Buffer Depth
is adjustable between 4 and 40 milliseconds. This al-
lows 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 con-
nection 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 scruti-
nized, and the isochronous stream number and its sup-
ported sampling rates can be viewed.
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