Write and play audio file

Hi everyone I have some data and i am creating the audio file of that data using audiowrite command with the sampling frequency of 256 Hz.but when i try to play back the same audio file again it starts giving error of invalid sample rate. Will anyone please help how to resolve this issue Thanks

[Kevin Chng]

Hi John Hock,

You may refer to the link below to check what is the minimum Hz can be play in your system or copy the code to test your system.

https://www.mathworks.com/matlabcentral/answers/396700-play-low-sampling-frequency-audio-in-matlab

foo = rand(1,1000);
for r = 80:8000; try sound(foo,r); fprintf('\nOk at %d!\n', r); break; catch ME; if mod(r,100)==0; fprintf('%d...', r); end; end; end

In my system, it allow 1000 minimum to play audio.

You may refer the discussion below in stockoverflow

https://stackoverflow.com/questions/49808926/play-audio-in-matlab

[John Hock]

Thanks @Kevin Now i want to re sample my data from 256 to 1024 hz using interpolation.Will you please help me in this regard

[Walter Roberson]

resample(YourSignal, 4, 1)

is the easiest approach.

Answer 1

[Kevin Chng]

Hi John Hock,

You may refer to the link below to check what is the minimum Hz can be play in your system or copy the code to test your system.

https://www.mathworks.com/matlabcentral/answers/396700-play-low-sampling-frequency-audio-in-matlab

foo = rand(1,1000);
for r = 80:8000; try sound(foo,r); fprintf('\nOk at %d!\n', r); break; catch ME; if mod(r,100)==0; fprintf('%d...', r); end; end; end

In my system, it allow 1000 minimum to play audio.

You may refer the discussion below in stockoverflow

https://stackoverflow.com/questions/49808926/play-audio-in-matlab

How to resample your data?

Answer from Walter Roberson,

resample(YourSignal, 4, 1)