Polycom C16 Manual do Utilizador descarregar pdf (Página 224)

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Design Guide for the Polycom SoundStructure C16, C12, C8, and SR12

9 - 8

Volume Control

Volume control in the room can be accomplished by adjusting the fader con-

trol on the “Amplifier” virtual channel as follows:

inc fader “Amplifier” 1

will increase the gain on the “Amplifier” channel by 1dB and

dec fader “Amplifier” 1

Alternatively the fader settings may be set to an absolute value with the set

command as follows:

set fader “Amplifier” 0

to set the value of the fader to 0dB.

The volume control range can be limited by setting a fader max and fader min

as shown in the API syntax below:

set fader max “Amplifier” 10

set fader min “Amplifier” -10

to limit the maximum and minimum user range of the fader control to +10 and

-10dB respectively. The max and min ranges only need to be set once and can

be configured as part of the SoundStructure Studio configuration file. If the

current amplifier fader setting is outside of this range, the range of the maxi-

mum or minimum fader values will be adjusted to include the current fader

setting.

In other words, to set a fader max or min value, the current fader value must

be within the range of values. Otherwise the range is extended to include the

current fader value.

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