ViewCast Osprey PCI, Руководство пользователя

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Audio Driver
92 ViewCast
the silent right channel, effectively halving the signal amplitude. Setting this control to Left will
result in only left channel data in the mono capture, with no amplitude drop.
Audio Level
This control sets the hardware Input Reference level and software-based Boost factor. The settings
are separate for each input of each device, and are applied to whichever input is selected in the
current application or in the system mixer. The settings displayed do
not
automatically update when
you change inputs in the application or mixer click Update to refresh the settings.
Figure 64. Audio Level
As the screenshot above shows, the Audio Level control is different depending on which input is
selected.
The Input Reference level is meaningful only on the analog unbalanced and balanced inputs, and is
calibrated differently for each. When a digital input is selected this control is disabled. This is a
hardware gain control with the default level chosen such that the expected amplitude of a full
volume input signal will have adequate headroom without clipping. If you do experience clipping, or
are working with very low-level signals, you can adjust this level. On this control, a higher reference
level results in lower gain, so the quietest setting is at the top of the scale. Click
Dflt to restore the
default value.
The Boost setting is a software gain adjustment that applies to both analog and digital inputs. Boost
can be set individually for each input. It supplements the system mixer volume controls by providing
a very wide adjustment range. You can use it to calibrate or normalize input levels across multiple
inputs; or to accommodate microphones or other non-line inputs that have nonstandard signal
levels. Again,
Dflt restores the default value.