Hello all, I am interested to know how can plot real time sine wave graph of speech signal and also would like to know how to implementation of LPF in app designer.

I would be so greateful, if anyone will help me out in logical way. thank you

Answer 1

[Sai Kiran]

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.

https://in.mathworks.com/help/dsp/ug/lowpass-filter-design.html

You can add any MATLAB code in the app designer as a callback function. It depends on your design requirements.

https://in.mathworks.com/help/matlab/app-designer.html?s_tid=CRUX_lftnav

I hope it helps!

Thanks

Sai Kiran Ratna

[Kulbir]

Hi there.

yes i am intersted in real time speech signal processing in app designer. plz share your knowlage if any. thank you

[Sai Kiran]

Hi,

In the app designer you can add a button which enables you to record the signal, for this you can add the code mentioned above to a specific button.

Please refer to the following link to get more info.

https://in.mathworks.com/matlabcentral/answers/881688-how-to-run-a-matlab-function-using-a-button-pushed-in-appdesigner

I hope it helps!

Thanks!

[Kulbir]

Hi , i am doing. and will reach out you in case of any query. than you very much