How can i play audio from a bluetooth speaker and record the audio using my laptops microphone ?

I’ve used the MATLAB code from the webpage “Play and record simultaneously”, i’m having issues with the channel for recording from my laptop, the audio plays fine from my loudspeaker using ASIO Driver.

[Geoff Hayes]

Victor - please attach the link to the page “Play and record simultaneously” and/or show the code that you are using to record the audio. By the way, how are you playing the audio - from your laptop or another device?

[Victor Dunira]

clear all
close all
clc;

% Create a signal to play and record
fs =44100;      % sampling frequency
fs2 =44100;   % sampling frequency
time = 10;       % signal duration
N = time * fs;  % number of samples
x = randn(1,N); % Gaussian white noise

filename = 'Whitenoise.wav';
audiowrite(filename,x,fs2); %%writes audio and saves as wav file

% [x,fs] = audioread('Whitenoise.wav');
% sound(x,fs);

fileReader = dsp.AudioFileReader('Whitenoise.wav', ...
    'SamplesPerFrame',2048); %%Reads the audio samples


fileWriter = dsp.AudioFileWriter('WhitenoisePlaybackRecorded.wav', ...
    'SampleRate',fs2); %%Writes audio samples to audio file


aPR = audioPlayerRecorder('SampleRate',fs2);

while ~isDone(fileReader) %% while reads the audio samples
    audioToPlay = fileReader(); 
    
    [audioRecorded,nUnderruns,nOverruns] = aPR(audioToPlay);
    
    fileWriter(audioRecorded)
    
    if nUnderruns > 0
        fprintf('Audio player queue was underrun by %d samples.\n',nUnderruns);
    end
    if nOverruns > 0
        fprintf('Audio recorder queue was overrun by %d samples.\n',nOverruns);
    end
end


[D2,fs2] = audioread('WhitenoisePlaybackRecorded.wav');

h = ifft(fft(D2)./fft(x'));
figure;
plot(abs(h));

Code was taken from MATLAB :

I downloaded ASIO driver from online in order for this code to work, as the code only works for a Full-Duplex device. The audio is being played and recorded through my laptop.

https://uk.mathworks.com/help/audio/ref/audioplayerrecorder-system-object.html

Answer 1

[Urmila Rajpurohith]

Hi

Refer to the below link which answers a similar question:

https://www.mathworks.com/matlabcentral/answers/569854-issue-with-trying-to-play-and-record-audio-simultaneously?s_tid=answers_rc1-2_p2_MLT

Hope this helps!