About This Application Note
The Getting and Setting Parameters and Arrays Application Note describes the ParamGet, ParamSet and ArraySet modules, and their respective usage.
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These modules can be found in the ‘Misc’ module folder in Audio Weaver Designer’s module palette on the left-hand side of the Designer window:
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Param Set Module
The ParamSet module takes a signal from an input wire and writes the incoming value to an instance variable in another module:
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An example layout (‘ParamSet_Example.awd’) further explaining the ParamSet module usage can be found in the ‘C:\DSP Concepts\<AWE Designer>\Examples\Module_Usage’ folder of the default Audio Weaver Designer installation path.
Param Get Module
Similar to the ParamSet module but opposite in functionality, the ParamGet module reads the value of a parameter from an existing module and outputs it on a wire for use elsewhere in the system.
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An example layout (‘ParamGet_Example.awd’) further explaining the ParamSet module usage can be found in the ‘C:\DSP Concepts\<AWE Designer>\Examples\Module_Usage’ folder of the default Audio Weaver Designer installation path.
Array Set & Param Set Table Modules
Similar to the ParamSet and ParamGet modules which act on scalar values, Audio Weaver also features modules for setting array values. At the time of this application note writing, Audio Weaver does not feature an ArrayGet module. Typically, if a user needs to know the values of an array, outputting the array to a Sink Module or a .csv satisfies any ArrayGet use cases.
Array Set Module
The ArraySet module can set array values of another module, with data from input wire.
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Table 3: ArraySet setBehavior Values
Param Set Table Module
The ParamSet Table module is similar to the ArraySet module but offers slightly different features for different use cases. The ParamSet Table module writes the values of one column of a statically defined table to an internal array of another module. A common use case is to update the coefficients of an FIR module based on changing conditions in the system.
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Figure 22: ParamSet Table Coeff Array Save/Cancel Changes
Modules Controlled by the Get/Set Modules
Any module controlled by one of the get/set modules described in this application note, will visually change and display which module it is controlled by in the Audio Weaver Designer canvas, in text under the module. As seen below in Figure 23, the FIR1 module has a dashed outline instead of a solid border, and the text under the module indicate that it’s coeffs array variable is controlled by the CoeffTable1 module:
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