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Interested in recording(thu USB) and plotting of speech signal in app designer.

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Kulbir
Kulbir 2023 年 3 月 2 日
コメント済み: Kulbir 2023 年 3 月 24 日
Hello , i need to know how i can record my speech/voice and plot it at the same time in app designer. Also need to know how to implement LPF/butterworth. Thank you

回答 (1 件)

Nikhilesh
Nikhilesh 2023 年 3 月 3 日
I hope the following steps can guide you.
  1. Add an audioRecorder object to your App Designer app. You can do this by adding a button or other UI component that calls a callback function when pressed. In this function, create an audioRecorder object using the audiorecorder function, and set the sample rate and number of channels.
  2. Add a loop to continuously read and process audio data. In this loop, use the record method of the audioRecorder object to record a fixed length of audio data (e.g., 0.1 seconds). Then, use the getaudiodata (Store recorded audio signal in numeric array - MATLAB getaudiodata (mathworks.com)) method to retrieve the recorded data as a vector of samples. You can then use this data to compute the spectrum or other characteristics of the audio signal.
  3. Plot the audio data in real-time. You can use the plot function to create a line plot of the audio data, and update this plot each time a new chunk of data is recorded.
  2 件のコメント
Kulbir
Kulbir 2023 年 3 月 21 日
Hi sir. i am trying to follow your way of designing app designer. will reach you if i need. thank you
Kulbir
Kulbir 2023 年 3 月 24 日
Hi there, i have tried to add audiorecorder. but it's not working. At the beginning, i would like to record , play and save the sound. kindly help me out. thx
%FOR RECORDING
Fs = 44100;
nBits = 16;
nChannels = 2;
ID = -1; % default audio input device
app.recObject = audiorecorder(Fs,nBits,nChannels,ID);
msgbox("Begin speaking.")
recDuration = 5; % record for 5 seconds
recordblocking(app.recObject,recDuration);
msgbox("End of recording.")
assignin('base','audioObject',42);
%PLAY
audioObject= evalin('base','audioObject');
y= getaudiodata(audioObject);%Undefined function 'getaudiodata' for input arguments of type 'double'.
Fs= audioObject.SampleRate;
sound(y,Fs);
%SAVE
file1= 'sound.wav';
audiowrite(file1,y,Fs)
%play(audioObject)

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