Proper gain structure – Biamp LTR User Manual
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System Design
The System Connect screen provides a System List (configured devices only) and a Device List
(all configured and non-configured devices). When a selection is made in the System List,
Connect To System
will establish communication with, and retrieve the configuration from, the
device(s) in that system. Send System Config will attempt to send an open file of a properly
compiled system configuration to the device(s) specified in the
. If the specified
device(s) have an existing system configuration, they may need to be
before a
new configuration can be sent successfully. Reset/Initialize, as well as other device related
settings, can be accessed by selecting Device Maintenance.
Audia software now employs the concept of "multi-client sessions". This is simply the capability
for multiple users to be connected to the same system simultaneously. Multi-client sessions also
allow a single user (PC) to be connected to multiple systems. In addition, a single user (PC) can
even have multiple connections to the same system. These multi-client sessions can include
connections from both Audia software and daVinci control software.
Multi-client sessions include two 'privilege levels'. A High Privilege Session (designated HPS in
the
) is assigned to the first user connected to the system. HPS allows all system
maintenance normally associated with that specific user (see
). Any additional
connections to that system will be Low Privilege Sessions (designated LPS in the
),
which allow system control only, regardless of user. When an HPS user disconnects, privilege
levels do not update (connected users remain LPS), and the next new user connection is
assigned as HPS.
and specific
functions (Reset/Initialize, Set IP Address,
and Update Firmware) are not allowed during a multi-client session. All other system users must
disconnect before these functions can be performed. Send Configuration often affects multiple
devices, which will be unavailable to other users during this process. Device Maintenance
functions affect individual devices, which will be unavailable to other users during this process.
NOTE: An exception to both situations mentioned above is when all other users are connected
via daVinci control software. Send Configuration & Device Maintenance are allowed under these
circumstances, and will automatically terminate any daVinci sessions.
Proper Gain Structure
Proper gain structure is important because it affects signal-to-noise performance and available
headroom within a sound system. Every sound system has some inherent noise, whether it be
self-generated by the internal electronics or induced into the signal path by external sources.
Therefore, unnecessarily low gain settings can result in signal levels which are significantly closer
to the noise floor, potentially causing a sound system to appear noisy. Conversely, excessive
gain settings may cause the audio signal to overdrive the electronics, resulting in severe
distortion due to clipping of the audio waveform. Besides being audibly undesirable, a distorted
waveform can also cause damage to some system components, such as loudspeakers.
In addition to its influence on signal-to-noise and available headroom, gain structure can affect
other aspects of sound system behavior. In particular, some audio components rely on signal
strength as part of their normal operation. These components may not perform as expected if
they receive signals that are lower, or higher, or even just different from what is anticipated.
Examples of such components are: Auto Mixers, Duckers, Levelers, Comp/Limiters, Ambient
Noise Compensators (ANC), and Acoustic Echo Cancellers (AEC).
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