How to read the audio information of a file directly from internet?

% Enter your MATLAB Code below
options = weboptions('Timeout', 1000);
tStamp = datetime;
filename = webread('http://file-examples.com/wp-content/uploads/2017/11/file_example_MP3_5MG.mp3', options);
a= plot(filename);
info = audioinfo(filename);

I am getting following error:

Error using audioinfo

Expected FILENAME to be one of these types:

char, string

Instead its type was matlab.graphics.chart.primitive.Line.

Error in audioinfo (line 48)

validateattributes(filename, {'char', 'string'}, {'vector'}, mfilename, 'FILENAME');

Error in Custom (no starter code) 5 (line 7)

info = audioinfo(a);

I am using Thingspeak as I am not having a working MATLAB license currently.

Answer 1

[Jan]

The error message is clear: webread replies the data delevered from the internet. Therefore the name of the variable "filename" is misleading. Store the obtained data in a file and use the file name as input for audioinfo. But then you get only the parameters which have been defined during writing the file. The original frequency must be requested directly:

[data, freq] = webread('http://file-examples.com/wp-content/uploads/2017/11/file_example_MP3_5MG.mp3', options);

[ashish kumar]

Hi Jan,

I am using Thingspeak for this purpose actually since I have lost my MATLAB license. In that I was able to do directly. but here I am not in ThingSpeak.

[ashish kumar]

% Enter your MATLAB Code below
options = weboptions('Timeout', 1000)
[data, freq] = webread('http://file-examples.com/wp-content/uploads/2017/11/file_example_MP3_5MG.mp3', options);
a = audioinfo(data,freq)
tout = 0:(a.Duration)
[y, Fs] = audioread(data,freq)
player = audioplayer(y, Fs)
sound(y,Fs)
tStamp = datetime

This is the updated code I ran on Thingspeak. It is able to read the data and freq and able to plot curve of spectrum, but for audioinfo it is throwing error.