Hi,
As per my understanding you want to plot the real time speech signal in matlab.
Please follow the below code to record any audio and to plot the signal.
recObj=audiorecorder;
recDuration = 5; % duration in seconds
disp("Begin speaking.")
recordblocking(recObj,recDuration);
disp("End of recording.")
play(recObj);
y = getaudiodata(recObj);
plot(y);
For futher information on analyzing the signals , refer to the documentation https://in.mathworks.com/help/matlab/import_export/record-and-play-audio.html
You can design the Low pass filter according to your application, refer to the documentation.
You can add any MATLAB code in the app designer as a callback function. It depends on your design requirements.
I hope it helps!
Thanks
Sai Kiran Ratna
