MATLAB: Unable to resolve the name audio.inte​rnal.visua​lizer.Filt​er.

audioAudio ToolboxMATLAB

Hello!
I keep getting the following error when executing the script AudioSystemToolboxIntroMain.m that accopanies the webinar "Real-time Audio Processing for Algorithm Prototyping and Custom Measurements" (https://se.mathworks.com/videos/real-time-audio-processing-for-algorithm-prototyping-and-custom-measurements-121075.html):
(Executing RealTimeStreaming.m works.)
Unable to resolve the name audio.internal.visualizer.Filter.
Error in ThreeBandParamEQ/visualize (line 122)
                obj.visualObj = audio.internal.visualizer.Filter(coeffs,...
Error in AudioSystemToolboxIntroMain (line 10)
visualize(eq)
I believe that I have all required toolboxes installed: 
>> ver
-----------------------------------------------------------------------------------------------------
MATLAB Version: 9.9.0.1467703 (R2020b)
MATLAB License Number: XXX
Operating System: Mac OS X  Version: 10.15.7 Build: 19H2 
Java Version: Java 1.8.0_202-b08 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
-----------------------------------------------------------------------------------------------------
MATLAB                                                Version 9.9         (R2020b)
Simulink                                              Version 10.2        (R2020b)
Antenna Toolbox                                       Version 4.3         (R2020b)
Audio Toolbox                                         Version 2.3         (R2020b)
Computer Vision Toolbox                               Version 9.3         (R2020b)
Curve Fitting Toolbox                                 Version 3.5.12      (R2020b)
DSP System Toolbox                                    Version 9.11        (R2020b)
Image Acquisition Toolbox                             Version 6.3         (R2020b)
Image Processing Toolbox                              Version 11.2        (R2020b)
MATLAB Compiler                                       Version 8.1         (R2020b)
MATLAB Compiler SDK                                   Version 6.9         (R2020b)
Optimization Toolbox                                  Version 9.0         (R2020b)
Phased Array System Toolbox                           Version 4.4         (R2020b)
Signal Processing Toolbox                             Version 8.5         (R2020b)
Statistics and Machine Learning Toolbox               Version 12.0        (R2020b)
Symbolic Math Toolbox                                 Version 8.6         (R2020b)
I've tried 
rehash toolboxcache
and reverting pathdef.m without success.
Thanks!

Best Answer

Hi Jens,
Thank you for posting about this. This issue seems to be related with an update in DSP System Toolbox, related to dsp.DynamicFilterVisualizer. Fixing the submission in MATLAB Central FIle Exchange will take a few days - In the meantime, you can get a more recent version of the code using the URL and credentials below (note that the files will be automatically deleted after 30 days):
https://sft.mathworks.com/human.aspx?r=&Arg07=707691901&Arg12=fileview
Username: Customer
Password: MathWorks
Thanks,
Gabriele.
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