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VAR8-ACU and Variants - Operation, Commissioning, Fault Finding, and Maintenance Guide
9 Music Input Configuration
The Router provides one unbalanced input typically for background music. Background music can be connected to any of the Mic/Line inputs, in addition to or instead of this dedicated music input.
The following table summarises the configurable input parameters, and indicates those parameters available for the Music input with a tick ( 9 ). Each parameter configuration is described in the following steps.
Table 7 Configurable Music Input Parameters
Input Type Surv EQ Fade Chime Gain
Music X 9
1)
9 X
1) High Pass Filter is not available for Music Input.
9
O/P
Gains
9
Pri Class Name Buttons Fallback
9 9 9 X X
9.1 Input Type and Name Configuration
To Configure the Music Input Type and Name:
1. If using the unbalanced input, select Input 9, which is the Music input.
Menu: ConfigurationÆSystemÆRouterÆInputsÆMic/LineÆI/P #<nn>
If using one of the balanced inputs, select the input, and then program it as ‘Miscellaneous Input’.
2. Change the Music input name as required. It is for reference only, and it is shown in input related menus.
Menu: ConfigurationÆSystemÆRouterÆInputsÆMic/LineÆI/P #<nn>ÆName
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VAR8-ACU and Variants - Operation, Commissioning, Fault Finding, and Maintenance Guide
9.2 Music Input Emergency Class Configuration
The Emergency Class is only relevant in networked units, and is used by Fire Microphones connected to the
VAR8-ACU to indicate the emergency DVA message status of the zone group configured for a zone select button via its red and green LEDs. See Section “
8.2 DVA Input Emergency Class Configuration ” for further
details.
To Modify the Music Input Emergency Class:
3. Select the Music input, and then modify its emergency class as required.
Note that the in addition to the unbalanced input (Input 9), a balanced input can be used for background music.
Menu: ConfigurationÆSystemÆRouterÆInputsÆMic/LineÆI/P #<nn>ÆCtrlÆClass
!
!
For correct indication of the emergency DVA message status on Fire Microphones
connected to the VAR8-ACU, as described in Section “ 8.2 DVA Input Emergency Class
Configuration ”, the background music must be set to ‘Non Emergency’ as specified in the
system default settings.
Changes to the system default settings may result in an inappropriate indication of the status of the zone or group of zones.
To Configure the Music Input Audio Parameters:
4. Select the Music input, and then modify the required audio parameters as follows.
Note that the in addition to the unbalanced input (Input 9), a balanced input can be used for background music.
5. Define a gain to be applied to the Music input, in respect of any output to which it may be routed.
Menu: ConfigurationÆSystemÆRouterÆInputsÆMic/LineÆI/P #<nn>ÆAudioÆGainÆInputs
L The input gain of each audio input should normally be set so that all inputs are balanced, and give the same output level on each of the outputs.
6. Define the relative gain for each frequency band (low, mid, and high frequencies) of 3-band equaliser.
Make sure that the switchable High Pass filter is disabled.
Menu: ConfigurationÆSystemÆRouterÆInputsÆMic/LineÆI/P #<nn>ÆAudioÆEQ
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VAR8-ACU and Variants - Operation, Commissioning, Fault Finding, and Maintenance Guide
7. Define the time over which this audio channel is faded up/down when audio sources change.
Menu: ConfigurationÆSystemÆRouterÆInputsÆMic/LineÆI/P #<nn>ÆAudioÆFade
L • A slow fade up time is desirable for music inputs.
• The time is given in tenths of a second, so divide by ten for the time in seconds.
• It is important for Fire Microphones to be able to override other sources quickly; therefore Fire Microphones are set-up for a short Fade Down time.
The Fade Down time is:
• The time it takes for the signal to fade down when turned off (un-routed);
• The time it takes for the signal to fade down before an overriding broadcast is made in its place
The Fade Up time is the time the signal takes to fade up when:
• Turned on (routed);
• Override removed.
This can be set to provide the desired changeover fading, e.g. when a broadcast interrupts background music, or a lower priority broadcast.
The diagram in
Figure 4 illustrates the sequence of events during the enabling and disabling of a single
audio source (e.g. background music).
Figure 6 Sequence of Events for Single Audio Source
T1
MUSIC
FADE UP=T1
FADE DOWN= T2
MUSIC AUDIO
T2
ON
OFF
The diagram in
Figure 5 illustrates the sequence of events during the override of a background music
source by a Paging Microphone with chime.
Note that the background music Fade Down time (T2) not used in this instance. Instead the microphone
Fade Down time (T4) is used.
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VAR8-ACU and Variants - Operation, Commissioning, Fault Finding, and Maintenance Guide
Figure 7 Sequence of Events for Paging Microphone Chime Overriding a Background Music
T4
T1
MUSIC AUDIO MUSIC AUDIO
MUSIC
FADE UP=T1
FADE DOWN= T2
ON
MICROPHONE
PTT
OFF
MICROPHONE
FADE UP=T3
FADE DOWN= T4
CHIME AUDIO
T3
MIC AUDIO
ON
MICROPHONE
SPEAK-NOW LED
OFF
8. If using a balanced input for background music, ensure that: a. The surveillance detection is disabled. b. The chime is disabled.
T4
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VAR8-ACU and Variants - Operation, Commissioning, Fault Finding, and Maintenance Guide
L • 19 priority levels are assignable to the Music input.
• Assignment of equal priorities means that those inputs operate on a ‘first-come-first-served’ basis.
• The lower the priority value, the higher the priority.
• DAU:
The input priority is used to resolve conflicts when two or more inputs try to broadcast to the same output. In this case the input with the highest priority will be able to broadcast, and the others will not.
Priority is assignable to each input per output. This is so that different inputs may have different priorities according to which zone they are serving. For example a particular microphone may have a high priority only in its local zone, and a lower priority when broadcasting elsewhere.
When Music input is overridden, then when the override is removed it is re-instated.
• ACU:
The input priority is used to resolve conflicts on the allocation of the network channels when two or more inputs try to broadcast. In this case the inputs with the highest priorities will be able to broadcast over the configured network channels, and the others will not.
Priority is assignable to each input. This is so that the assignment of the network channels can be arbitrated between the audio inputs into the Audio Control Unit.
To Allocate Priority to the Music Input:
9. Select the Music input, and then modify the priority as required.
Note that the in addition to the unbalanced input (Input 9), a balanced input can be used for background music.
Menu: ConfigurationÆSystemÆRouterÆInputsÆMic/LineÆI/P #<nn>ÆCtrlÆPri
Possible options: 01 to 19 (01 is the highest priority)
The background music may be overridden by any audio sources with higher priority.
Assignment of equal priorities means that those inputs operate on a ‘first-come-first-served’ basis.
!
!
Care should be taken in ensuring that music sources have appropriately low priorities to ensure that they can be overridden by emergency and microphone audio sources. For this reason the Music input default priority is 19 (lowest). Priority adjustment may be required when using a balanced input.
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VAR8-ACU and Variants - Operation, Commissioning, Fault Finding, and Maintenance Guide
Reference to Configuration Tool
3
9
5
1
7
6
2
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