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HMD8 DSP/
USER’S MANUAL
The output channels represent the points where the sound is reproduced, i.e. where the speakers are physically
connected. Ultimately, the output configuration is the one that most characterizes the audio system.
It is important to have the system project clearly in mind before starting: the type and the position of loudspeakers,
the need for bridged channels, how many listening areas must be created.
So, for each output channel:
• assign a meaningful name;
• specify if it is a bridge mode channel;
• assign the channel to a listening zone;
• if necessary assign the channel to one or more groups.
Disable unused channels.
At this point it is possible to define the position of each speaker in the respective listening area. This setting is very
important, because it provides essential information to the software for the automatic calculation of delays in order
to align the sound stage.
To avoid damaging the speakers, before starting to play the system it is important to set the crossover filter of each
output channel (for each source you intend to use) with an initial value that respects the dynamic range of each speaker.
At a later stage you can go back and adjust this setting to get the best result.
Once the input and output configurations are known, the mixer can be set.
Now that the system is playing, you can act on the levels of the individual output channels, to balance the energy
contribution of each speaker and if necessary also the time alignment.
This step can be done once the system is well defined.
In fact it is the optimization of the sound stage, that is a compensation of all those factors, internal and external to
the system, that ensures a correct sound reproduction.
The ultimate goal is to achieve a balanced setup, in which all the components act consistently to provide a neutral
listening experience.
In the mixer, the signal of each output channel can be constructed as a weighted sum of the signals coming from the
input channels.
Remark:
starting from the default configuration, at this point the system does not reproduce any sound yet.
We must specify how the inputs flow onto the outputs.
Remark:
it is important to bear in mind that these adjustments refer to the position in which the listening area is centered.
Remark:
although it might seem obvious, it is worth keeping in mind the fact that each source has its own mixer.
6.4.1.3
OUTPUT CHANNELS DEFINITION
6.4.1.4
CROSSOVER INITIALIZATION
6.4.1.5
MIXER SETUP
6.4.1.6
OUTPUT LEVEL AND DELAY ADJUSTMENT
6.4.1.7
CROSSOVER AND EQUALIZER CONFIGURATION
WARNING:
this setting is related to a particular output channel, for the currently selected source. It must therefore be
repeated for all output channels, for each source.
WARNING:
acting on the mixer, the system will start to reproduce audio. It is strongly recommended to keep the
general volume of the system at a very low level, to avoid damaging the speakers.
WARNING:
output level is related to a specific output channel.
Its regulation must therefore be repeated for all output channels.
WARNING:
these settings are related to a specific output channel, for the currently selected source. They must
therefore be repeated for all output channels, for each source.
WARNING:
delay adjustments are related to a specific output channel, for the currently selected source.
They must therefore be repeated for all output channels, for each source.
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