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

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!

Answer 1

[Gabriele Bunkheila]

This code was indeed last updated when its accompanying video was recorded. I understand we decided to kept the two "in sync" to let the code match what's seen in the video.

The documentation of Audio Toolbox these days includes many examples illustrating these and more workflows and I would encourage to refer to those first.

If you are still interested in using this code with a more recent MATLAB release, you can try to upgrade it yourself by replacing the discontinued helper object audio.internal.visualizer.Filter with the newer dsp.DynamicFilterVisualizer. Other small updates may be necessary.

If getting a working version of this code is important to you and you can't easily fix yourself, please message me privately and I will do my best to help.

[Jens Ahrens]

This one works, indeed. Thanks for looking into this so quickly!

[luchen]

I got the same error, but the code was deleted. Could you please share the code one more time? Thank u!

[Gabriele Bunkheila]

Apologies as I haven't yet been abel to update the original repository. Please download the updated version using the link and credentials below (link valid for 30 days as earlier):

https://sft.mathworks.com/human.aspx?r=&Arg07=717131777&Arg12=fileview

Username: Customer

Password: MathWorks

Thanks,

Gabriele.

[luchen]

Thank you very much! It really helps me!

[Chapel West]

Hi Mr. Bunkheila, I too am having this problem months later. If it is not too much trouble, could you send the link again? If you have any additional feedback, that would be awesome! Thank you.

[Gabriele Bunkheila]

Thank you for posting here. Please download the updated code using the link and credentials below (the archive will be automatically deleted after 30 days):

https://sft.mathworks.com/human.aspx?r=&Arg07=754574544&Arg12=fileview

Username: Lakeside

Password: 8bem7n3d

You can refer to the readme file in the archive to get started. I hope this helps.

Thanks,

Gabriele

[Kelvin Tan]

I am having the same problem, could I get a new link to the code?

[Wenkang Liu]

Hi, I got the same problem. it shows

' Unable to resolve name: 'audio.internal.visualizer.Filter' '

Could I get more infos about that?

[Timo Grothe]

Hi Mr. Bunkheila, I too am having this problem many months later. If it is not too much trouble, could create a new download link to share the new version? Thank you.

Answer 2

[luchen]

Hello Jens, I got the same error when running the code, and I really need it to do my research. Could you please share the latest version of the code to me? Thanks!

[Gabriele Bunkheila]

See reply above. Thanks for your patience.