ISA Menu

This menu page is used to configure the ISA instrument (Immersive Sound Analyzer). Based on the functionality of the Surround Sound Analyzer, the ISA - Immersive Sound Analyzer displays all relevant technical and subjective parameters of immersive surround formats like 5.1.2, 5.1.4 7.1.2 or 7.1.4 in a fast and easy readable way. The graphical display has been carefully designed so that the dynamic behaviour of all display elements corresponds to the subjective listening impression, showing the balance of the surround program intuitively and at a glance not only in a layer but also in its spatial expansion.

Detailed information about the display can be found in the  -> Background: ISA chapter at the end of this help page.

  

Initial Instrument Settings section
Key Settings section
Background: ISA
 
 

Initial Instrument Settings section  

In this section, the initial states of the functions for ISA are set.

  

• Scale
This key is used to select the scale for the 45° coordinate system. With Classic selected, the marking of the axes follows the settings of the PPM and SPL displays including the corresponding weighting filters. With Loudness, selected, the marking of the axes overtakes the settings of the selected loudness standard.

Options:

  

Classic | Loudness

Default value:

  

Classic

  

• PSI
This key is used to activate or deactivate the phantom source indicators showing the position and width of phantom sound sources of one layer. The line colors show the phase correlation of the adjacent channels (green: positive range, yellow: "0" range, red: negative range).

Options:

  

on | off

Default value:

  

on

  

• Correlator
This key is used to activate or deactivate the additional phase correlation meters of the outer (surround) channel pair(s) of one layer.

Options:

  

on | off

Default value:

  

on

  

• LFE Phase
This key is used to activate or deactivate the additional warning display "LFE Phase!". This warning lights up in the lower section of the SSA, if the correlation between any channel and the LFE channel turns to negativ values.

Options:

  

on | off

Default value:

  

off

  

• DMI
This key is used to activate or deactivate the indicator (cross-hair pointer) for the position of the dominant sound event (dominance vector - subjectivly sensed acoustical focal point) of one layer.

Options:

  

on | off

Default value:

  

on

  

• IDI
This key is used to activate or deactivate the indicator (variable white dot) for the position of the spatial dominant acoustic focal point (height of the signal) of the overall sound field.

Options:

  

on | off

Default value:

  

on

  

• Layer
This key is used to preselect the layer for which the described functions will initially be available in the Control Bar.
The respective key in the Control Bar has toggle function with the switching states "Middle" and "Top". It is used to select the respective layer.
When "Middle" is selected, the keys of the Control Bar control the functions of the Main Bed (middle layer).
When "Top" is selected, the keys of the Control Bar control the functions of the Upper Bed (top layer).

Options:

  

Middle | Top

Default value:

  

Middle

  

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Key Settings section  

  

• Keys
The "ISA Keys" menu entered with the "Configure" key is used to define the keys that will be available in the instrument's and the local Control Bar and to define the routing of the global keyboard.

  

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Background: ISA  

Immersive surround formats like 5.1.2, 5.1.4 7.1.2 or 7.1.4 normally consist of a Main Bed with the 5.1 or 7.1 part and an Upper Bed with the 2.0 or 4.0 part. The respective layer-related total volumes resp. the ambient signal are shown with cyan- and orange-colored lines of Total Volume Indicators (TVI) similar to the Surround Sound Analyzer. The spreading of the lines give feedback about the volume and the phase relations between the channels.

A Dominance Indicator (DMI as cross-hair pointer) can be added to every layer or bed, and an Immersive Dominance Indicator (IDI as variable white dot) across the layers. While the DMIs display the respective subjective sensed acoustical focal point inside of one layer, the position and the size of the IDI moving between the cross-hair pointers represent the perceived position of the spatial dominant focal point (height of the signal) of the overall sound field. A decreasing point and its approach to the cyan-colored cross-hair pointer indicates the moving of the focal point to the Main Bed. A big point near to the orange-colored and turned cross-hair pointer allows conclusions to be drawn about the volume relations between the layers or beds.

For the evaluation of the phase relationship between the channel pairs, correlators and Phantom Source Indicators (PSI) can alternately be displayed for one of the layers.

Please note the description of Menu: SSA.

  

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