1. Community Forum
  2. AWE Designer
  3. Using Matlab with AW Pro

Using Matlab with AW Pro

5 posts / 0 new
Log in or register to post comments
Last post
Thu, 02/12/2026
3:38pm
jasond
#1
Top
#1
Using Matlab with AW Pro

I've created a very simple AudioWeaver (version 8.2025.2A Pro) model to be run natively on server/PC  (no external hardware) with a BiquadCascadeV2 block that I'd like to control via a Matlab 2024b script. The problem I'm having is that after I change the number of stages from 2 to 3 within Matlab and updating the design (using set_gsys), the block display in Canvas shows the new correct number of stages (when I hit propagate changes button), but when I right click and select Attributes, the Module Properties arguments field still shows gain stages  equal to 2. This is limiting my being able to set the coefficients in Matlab.    See code below.

 

1. How do I get the number of stages to update properly from within Matlab or this a bug?  

2. Is it necessary to use propagate changes in this workflow and is there a way to execute this from within Matlab (and not the Designer GUI)?

 

Thank for your help.

 

awe_designer

modelname = 'test1.awd'

GSYS.SYS.BiquadCascadeV2_1.numStages = 3;  % increase stages from 2 to 3

set_gsys(GSYS,modelname);  %

 

GSYS = get_gsys(modelname); % pull model that is already open in AW designer GUI

coeffs = transpose(sos(:,[1:3,5:6]));   % sos is defined elsewhere as 3x6 double

GSYS.SYS.BiquadCascadeV2_1.coeffs = coeffs;  % gives error since numStages is  still 2

set_gsys(GSYS,modelname);

Image icon designer1.png
Tue, 02/17/2026
5:29pm
DSPC_Gary
Top

Hi JasonD,

I've been able to reproduce your observations.  I'm going to have to dig deeper but wanted to let you know I am looking at it.

Thanks,

Gary

Tue, 02/17/2026
6:36pm
DSPC_Gary
Top

Hi JasonD, please try the following.

% assume that test-1.awd is in the current MATLAB folder
awe_designer('test-1.awd')
GSYS = get_gsys()
BQArgs = {4}
S = readd_module(GSYS.SYS, '', 'BiquadCascadeV2_1', 'BiquadCascadeV2_1A', BQArgs)
% confirm
S.BiquadCascadeV2_1A.numStages
S.BiquadCascadeV2_1A.coeffs
% write back to AWE Designer
GSYS.SYS = S
set_gsys(GSYS, 'test-1.awd')

Here's the reference for the "readd_module" MATLAB function.

Thanks,

Gary

Binary Data test-1.awd
Wed, 02/18/2026
1:08am
jasond
Top
(Reply to #3)

Hi Gary,

I tried the code you provided.  After running  it in Matlab, and then right clicking (to View Attributes) on the BiquadCascadeV2 block in the Canvas in the AWE Designer GUI, I immediately get an error  in Matlab in red (see screenshot).  Something seems to still be referring to the old name (BiquadCascadeV2_1).  Any suggestions on what to try next?

 

Also, per my other question, how do I do in Matlab  the equivalent of clicking the "Propagate Changes"  button in the GUI?  Without doing that, the Module Properties NumStages field does not update to 4.

Thank you for your assistance.

Image icon screenshot_2026-02-17_215537.jpg
Image icon screenshot_2026-02-17_215501.jpg
Wed, 02/18/2026
5:46pm
DSPC_Gary
Top
(Reply to #4)

Hi Jason,

Please try the following.  The "prebuild" line accomplishes the "Propagate Changes" step.  You will need to at least redraw (right click on canvas to get the context menu) to see the changes.

% assume that test-1.awd is in the current MATLAB folder
awe_designer('test-1.awd');
GSYS = get_gsys();
BQArgs = {4};
S = readd_module(GSYS.SYS, '', 'BiquadCascadeV2_1', 'BiquadCascadeV2_1', BQArgs);
% confirm
S.BiquadCascadeV2_1.numStages
S.BiquadCascadeV2_1.coeffs
% write back to AWE Designer
GSYS.SYS = S;
GSYS.SYS=prebuild(GSYS.SYS);
set_gsys(GSYS, 'test-1.awd');

Thanks,

Gary