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NXC-VOL4 Volume Control Card

NetLinx Cardframe, Control Cards, and NetModules

NXC-VOL4 Channel Assignments

The NXC- VOL4 channel assignments are listed in the following table. This card has 2 ports with 2 audio

"channels" in each port. The two audio "channels", which can be used as right and left, should not be confused

with the channel assignments, which are sent to and from the card.

Ramping a volume channel while the mute channel is on will not automatically turn off the mute channel but

the ramping will still occur; the volume change will be noticed when the mute channel is turned off. For setting

ramp rates and presets, refer to theProgramming Information section on page 40.

NXC-VOL4 Levels

Volume (audio) channels 1 and 2 use levels 1 and 2 respectively. For reading current volume levels and

displaying bargraphs seeCREATE_LEVEL andSEND_LEVEL. The two levels associated with each port of the

NXC-VOL4 Control Card are listed in the table below:

CREATE_LEVEL

This keyword creates an association between a specified level of a device and a variable that will contain the

value of the level.

This can only appear in the DEFINE_START section of the program.

CREATE_LEVEL DEV, Level, Value

Parameters:

DEV: The device from which to read the level.

Level: The level of the device to read.

Value: Variable in which to store the level value.

DevLev: A DEVLEV structure.

Value: Variable in which to store the level value CREATE_LEVEL DevLev, Value.

During execution of the program, NetLinx continuously updates the variable to match the level that it

represents.

NXC-VOL4 Channel Assignments (per port)

Port 1

Channel:

Port 2

Channel:

Description

11While channel is on, ramps the volume on audio channels 1 and 2 up (increase).

22While channel is on, ramps the volume on audio channels 1 and 2 down (decrease).

33While channel is on, the volume on audio channels 1 and 2 are muted (lowest

volume); when channel is off, the volume levels are restored to their previous levels.

44While channel is on, ramps the volume on audio channel 1 up (increase).

55While channel is on, ramps the volume on audio channel 1 down (decrease).

66While channel is on, the volume on audio channel 1 is muted (lowest volume); when

channel is off, the volume level is restored.

77While channel is on, ramps the volume for audio channel 2 up (increase).

88While channel is on, ramps the volume for audio channel 2 down (decrease).

99While channel is on, volume for audio channel 2 is muted (lowest volume); when

channel is off, the volume level is restored.

NXC-VOL4 Levels

Port 1 Port 2

Level Description Level Description

1 Output #1 1 Output #3

2 Output #2 2 Output #4

1 2 ... 42 43 44 45 46 47 48 49 50

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