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Argument with drop down menu

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Thu, 11/13/2025
3:33am
f.kaiser_15700
#1
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Argument with drop down menu

Hello,

I want to set an argument with a drop down menu. I can see this is done in for example Biquad Sparse V6.

I could not find documentation on any fields of the argument. For a variable, I found the following way:

value_range = [0 1];
value_list = 'val1=0 val2=1';
add_variable(M, 'my_var', 'int', 0, 'parameter', 'Set my_var.');
M.my_var.range=value_range ;
M.my_var.isRangeEditable=0;
M.my_var.isHidden=0;
M.my_var.guiInfo.controlType='droplist';
M.my_var.guiInfo.nameValueList=value_list;

But I need this for an argument, so I tried it like this:

value_list = 'enum val1=0,val2=1';

add_argument(M, 'MY_VAR', value_list , 0,  'const',  'Comment.') 

 

This gives me the drop down for the argument, but when I switch to val2 in the dropwdown,

I get the following error:


  ERROR: Event handler returned an error.
  Error stored in AWE_INFO.designer.lastComErr. Type:
  rethrow(AWE_INFO.designer.lastComErr)
  to examine the error in detail.
  Summary Message: This data type is not yet handled  File: target_number_to_string
  Line: 0
>> rethrow(AWE_INFO.designer.lastComErr)
Unable to resolve the name 'AWE_INFO.designer.lastComErr'.

 

What can I do?

 

Thanks

 

Thu, 11/13/2025
11:54am
DSPC_Gary
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Here's the code that handles the filter type in BiquadSparseV6.

% Set the default filterType to be bypassed.
NUMCHANNELS=1; % default values for initializing variables below
add_array(M, 'filterType', 'int', zeros(NUMSTAGES, NUMCHANNELS), 'parameter', 'Selects the type of filter that is implemented by the module: Bypass=0, Gain=1, Butter1stLPF=2, Butter2ndLPF=3, Butter1stHPF=4, Butter2ndHPF=5, Allpass1st=6, Allpass2nd=7, Shelf2ndLow=8, Shelf2ndLowQ=9, Shelf2ndHigh=10, Shelf2ndHighQ=11, PeakEQ=12, Notch=13, Bandpass=14, Bessel1stLPF=15, Bessel1stHPF=16, AsymShelf1stLow=17, AsymShelf1stHigh=18, SymShelf1stLow=19, SymShelf1stHigh=20, VariableQLPF=21, VariableQHPF=22, Resonant=23, RawCoeffs=24.');
M.filterType.range=[0 24];
M.filterType.isRangeEditable=0;
M.filterType.arraySizeConstructor='ClassWire_GetChannelCount(pWires[0]) * S->numStages * sizeof(float)';
M.filterType.guiInfo.controlType='droplist'; 
M.filterType.guiInfo.nameValueList='Bypass=0 Gain=1 Butter1stLPF=2 Butter2ndLPF=3 Butter1stHPF=4 Butter2ndHPF=5 Allpass1st=6 Allpass2nd=7 ShelfLow=8 ShelfLowQ=9 ShelfHigh=10 ShelfHighQ=11 PeakEQ=12 Notch=13 Bandpass=14 Bessel1stLPF=15 Bessel1stHPF=16 Shelf1stLowAsym=17 Shelf1stHighAsym=18 Shelf1stLowSym=19 Shelf1stHighSym=20 VariableQLPF=21 VariableQHPF=22 Resonant=23 RawCoeffs=24';
 

Thanks,

Gary

Fri, 11/14/2025
3:25am
f.kaiser_15700
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Hi Gary, could you share the code for biquadForm in  Biquad Sparse V6  please? I want to set a single value, not an array.

 

Thanks

 

Fri, 11/14/2025
1:52pm
DSPC_Gary
Top

Here you go.

add_argument(M, 'biquadForm', 'int', BIQUADFORM, 'const', 'Underlying biquad implementation to use. DF-2, TDF-2 or DF-1');

M.constructorArgument{end}.guiInfo.controlType='dropList';

M.constructorArgument{end}.guiInfo.nameValueList='DirectForm_2=0 DirectForm_1=1 DirectForm_2_Transposed=2';

...

add_variable(M, 'biquadForm', 'int', BIQUADFORM, 'const', 'Flag indicates which direct form implementation to use, DF-2, TDF-2 or DF-1. Default is DF-2.');

M.biquadForm.range=[0 2];

M.biquadForm.isRangeEditable=0;

M.biquadForm.isHidden=1;

...

% ----------------------------------------------------------------------

 

M.textLabelFunc   = @biquad_sparse_v6_text_label;

% Draws the text label for the AWE Designer GUI.

% ----------------------------------------------------------------------

function L=biquad_sparse_v6_text_label(M)

L = cell(0, 0);

L{1} = sprintf('numStages: %d',M.numStages);

L{2} = sprintf('smoothingTime: %d',M.smoothingTime);

switch M.biquadForm

    case 1

        formStr = 'DF1';

    case 2

        formStr = 'TDF2';

    otherwise

        formStr = 'DF2';

end

L{3} = sprintf('biquadForm: %s',formStr);

return;

Mon, 11/17/2025
4:34am
f.kaiser_15700
Top

Thank you very much. This would be very helpful to see in the documentation or in an example. I also wonder why the syntax is not the same as for a variable.