MATLAB: Plotting the recorded sound while recording

contunirecordingsoundspeech

Hi,

Is it possible to record speech from microphone and plot it continuously?

I tried to use "audiorecorder" but, it plots the results after recording. What I want to do is, for instance I want to record for 5 sec. While recording I want to see what is recorded in every sec. X-axis (time) should be between 0 and 5 at the end of the recording and the whole record must be shown on one plot.

Thanks…

Best Answer

Huseyin - yes, you can do what you want using the audiorecorder and a timer function that could fire every one second and process/plot the data captured in that last one second. See How to record and analyze audio in real-time for an idea of how to proceed.

See also How to trigger the microphone to record via a GUI pushbutton for an example that provides information.

Related Solutions

MATLAB: How to record and analyze audio in real-time

Yanping - when I've used the audio recorder object to record from my microphone, I just add a timer object to the recorder. Then (for example) every second, the timer fires, and I process the most recent one second of data (since the lsat time the timer fired). Something like

 recorder = audiorecorder(8192,8,1);
 set(recorder,'TimerPeriod',1,'TimerFcn',{@audioTimer});

MATLAB: Stopping a function in between GUI

Max - rather than using the sound function to play the audio recording, consider using an audio player object which provides the ability to stop the audio playback. For example, in your play button callback, you could do

% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB

% handles    structure with handles and user data (see GUIDATA)

fs = 44100; % Hz

t = 0:1/fs:10; % seconds
f = 440; % Hz
y = cos(2.*pi.*f.*t);
handles.hAudioPlayer = audioplayer(y,fs);
guidata(hObject, handles);
play(handles.hAudioPlayer);

The last three lines in the above code, we create the player, save the updated handles structure (which has a field for the handle to the audio player), and then start the (non-blocking) playback.

Now, in the stop button callback, you could do

% --- Executes on button press in pushbutton3.
function pushbutton3_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton3 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
if isfield(handles,'hAudioPlayer')
    stop(handles.hAudioPlayer);
end

We check to see if there exists an audio player handle field in the handles object, and if so, then we just stop the playback.

Try the above and see what happens!

Best Answer

Related Solutions

MATLAB: How to record and analyze audio in real-time

MATLAB: Stopping a function in between GUI

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