[Weired] Data not update when placed in a for/while loop

I used matlab and python interface to convert my voice to text:

When run the code again and again, it successfully record my speech and show the correct text.

However, when I just surround the code with while loop or for loop, weired thing happend: No matter what I speak from 2nd loop, everytime it shows the text the same as the first run of the loop.

I have checked that voice data : data1 was fresh everyround by showing the mean value and it indeed differs each cycle. So its not the problem of data1.

%while 1
% record voice to a file
    recorder = audiorecorder(Fs,Bits,nChannel); 
    recordblocking(recorder,4);
    x = getaudiodata(recorder);
    audiowrite(filename,x,Fs);
% read file
	fid = fopen(filename,'r+');
	data1 = uint8(fread(fid))';
	disp(mean(data1(:)));
	fclose(fid);
%end

Answer 1

[Image Analyst]

Try using 'w' instead of 'r+'.

[raym]

after use 'w', the read data1 is [].

But I found a solution now:

just wrap all the code into a fucntion, and put this function into loop, then it is OK now.

[Image Analyst]

Sorry - my answer was not right - I didn't look at your code closely enough. I don't think your mean computation is right. I think you should use audioread() to read your data instead of fread() since not all data in the file is sound amplitude data, though I'm not familiar with the flac format.

[raym]

Hi,

the py module argument is the binary data of the file , not the audio data.