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====== Growable Single Volume Control ======
[[:resources:tools-software:sigmastudio:toolbox:volumecontrols|Click here to return to the Volume Controls section.]]
|The Growable Single Vol Ctrl (or "Growable Single Volume Control") algorithm applies gain to an input signal. The gain is updated using an RC-type slew curve. The number of input channels is scalable - each input is routed to a corresponding output pin. The same gain is applied to all input channels simultaneously.|{{:resources:tools-software:sigmastudio:toolbox:volumecontrols:growablesinglevolumecontrol1.jpg}}|

===Input Pins===
^Name^Format [int/dec] - [control/audio]^Function Description^
|Pin 0: Audio Input|decimal - audio|Audio Input - Channel 0|
 
===Output Pins===
^Name^Format [int/dec] - [control/audio]^Function Description^
|Pin 0: Audio Output|decimal - audio|Audio Output - Channel 0|

===GUI Controls===
^GUI Control Name^Default Value^Range^Function Description^
|Volume Slider (dB)|0|-144 to +24|Controls the target level for the output gain|

===DSP Parameter Information===
^GUI Control Name^Compiler Name^Function Description^
|Volume Control Slider|GainS200AlgGrowDP1gain_target|Target value for the output gain.|
|N/A|GainS200AlgGrowDP1alpha|Rate at which the output gain slews to the target value. The alpha and 1-alpha values are stored in consecutive memory locations. Note: This parameter is stored in non-modulo data RAM.|

===Algorithm Description===
The Growable Single Volume Control applies gain to any number of input signals. It is implemented using a slew curve approximating an RC curve. The same instantaneous gain value is applied to all input signals simultaneously.
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This plot shows the response of an input signal when the gain is changed from zero (linear) to one (full scale, linear):
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{{:resources:tools-software:sigmastudio:toolbox:volumecontrols:growablesinglevolumecontrol2.jpg}}
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This plot shows the response of an input signal when the gain is changed from one (full scale, linear) to zero (linear):
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{{:resources:tools-software:sigmastudio:toolbox:volumecontrols:growablesinglevolumecontrol3.jpg}}
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===Example===
This example shows 4 digital audio channels being processed by a Growable Single Volume Control cell. When the slider is moved, the gain of all 4 channels will be uniformly changed, following an RC slew curve.
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{{:resources:tools-software:sigmastudio:toolbox:volumecontrols:growablesinglevolumecontrol4.jpg}}
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===Algorithm Details===
|Toolbox Path|Volume Controls - Adjustable Gain - Single/Multiple Controls - Clickless SW Slew - Growable Single Vol Ctrl|
|Cores Supported|ADAU144x \\ ADAU1761 \\ ADAU1781|
|"Grow Algorithm" Supported|yes - see Algorithm Growth Information|
|"Add Algorithm" Supported|yes - see Algorithm Addition Information|
|Subroutine/Loop Based|no|
|Program RAM|7*|
|Data RAM|3*|
|Parameter RAM|3*|
 *Numbers are based on one instance of the algorithm with no additional "add" or "grow"

===Algorithm Growth Information===
|Description|An extra channel is added. The application of gain to each channel is done with the same calculation.|
|Program RAM Repetition|2 per growth|
|Data RAM Repetition|1 per growth|
|Parameter RAM Repetition|none|

===Algorithm Addition Information===
|Description|An extra channel is added. The gain calculation is done separately for each channel, so the program, data, and parameter RAM requirements double.|
|Program RAM Repetition|7 per add|
|Data RAM Repetition|3 per add|
|Parameter RAM Repetition|3 per add|
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