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9 : 1.Signal routing and DSP ar-
chitecture
Signal processing on Outline GTA series amplifier plat-
forms accomplishes multiple functions that affect the audio
signal before power amplification. The main adjustments
include gain, polarity, delay, limiting and signal equalization;
some processing functions are related only to particular
stages, such as limiting and damping control that are imple-
mented in the output section only, or input priority assign-
ment available in the input section.
The processing architecture is composed of six sections:
X
Input source selection. The input section allows you
to manage input gain and delay of analog and digital
sources, in order to compensate transmission latency
ArmoníaPlus is the default configuring interface that
allows system setting and customization of the GTA series
amplifier platforms.
ArmoníaPlus can be installed on a PC running Windows
(XP SP3 and higher). ArmoníaPlus is available for free from
the Armonía website, where a startup guide and in depth
tutorials are also provided:
https://armonia.powersoft.it/
Once you’ve installed ArmoníaPlus, it is necessary to
download the GTA plug-in from Armonía Marketplace.
GTA series amplifier platforms can be connected to a PC
running ArmoníaPlus through a Fast Ethernet connection.
In order to start remote operation, the amplifier must be
added into the ArmoníaPlus Workspace. Add the amplifier
by selecting the family and model.
The GTA series amplifier must then be matched by click-
ing on the Match section of the workspace, and then by click-
ing on “Discovery” to reveal any device which is available on
the network.
The callback button – located rightmost on the front
panel of the amplifier – allows you to highlight the amplifier
in the discovery panel.
9 : 2.Purposed workflow
Once the loudspeaker layout has been defined, we
suggest a bottom-up configuration procedure that starts
from the configuration of the transducers layout and raises
toward the input selection and the definition of the backup
policy.
Shortly, the main steps to follow are:
1. Load the loudspeaker presets or manually configure
the loudspeaker layout (grouping output channels,
crossovering, limiting, speaker processing, etc.).
2. Define the routing path and the levels of the signals
from the input channels to the active output channels
(matrix).
3. Select the signal source from the input connections
and define the backup policy (input source selection).
and levels. Furthermore, the GTA series implements
a backup policy aimed to improve reliability against
signal fault. By assigning a bus priority to the four
different input sources – analog, AES3 and two Dante
streams – per channel, the system is able to automati-
cally switch to a reliable input connection in case of any
signal fault.
X
Matrix. The innovative routing engine of GTA series
allows any input to be routed to any output. The Matrix
implements a non-Boolean routing architecture allow-
ing free channel assignment and level adjustment.
X
Advanced processing. This allows you to optimize
levels and shape the sound of the input signals. Gain
and polarity adjustment, asymmetric raised-cosine
full parametric filters, delay and mute are available on
each channel routed to the speaker section.
X
Speaker equalization. Designed to manage the configu-
ration presets for multi-way systems, it implements
FIR and IIR full parametric filters.
X
Speaker routing. Once properly grouped, the output
channels are presented to the matrix as speakers – a
single row representing a speaker (actually group of
ways) – allowing a high grade of granularity in signal
processing.
X
Output processing. This allows fine-tuning of output
signals, aiming to optimize power delivering and loud-
speaker performance. It provides gain and polarity
adjustment, IIR and FIR full parametric filters, delay,
mute, limiting and damping control on each output
channel.
FIG. 3:
ArmoníaPlus.
OUTLINE S.R.L.
Via Leonardo da Vinci, 56
25020 Flero (Brescia) Italy
Tel.: +39 030.3581341
Fax +39 030.3580431
[email protected]
www.outline.it
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