Amelia_james1 asked . 2020-02-12

How do you save a new audio file from a sound on matlab?

Hi, I'm trying to write use matlab to take some sound files, trim them to the same size, and save them into a completely new folder with new names without overwriting the original. I've been trying to use audiowrite, but it gives me an error:

Error using audiowrite
The value of 'filename' is invalid. Expected input to be one of these types:
char
Instead its type was double.
Error in audiowrite>parseInputs (line 226)
parse(p,filename, y, Fs, pvpairs{:});
Error in audiowrite (line 103)
props = parseInputs(filename, y, Fs, varargin);

This was after using the code audiowrite(anna_ten10, trimmed_anna_ten10, 44100) where anna_ten10 was the original file that was trimmed, trimmed_anna_ten10 was the trimmed file that I would like to make into a seperate file, and 44100 was the fs. I'm not sure what to put in place of anna_ten10, since I don't want that file to be overwritten, but I've tried putting the new folder directory there and it isn't saving. What should I do?

signal processing

Expert Answer

Prashant Kumar answered . 2024-12-21 03:46:21

The file name has to be a string:

audiowrite('anna_ten10.wav', trimmed_anna_ten10, 44100)

I am assuming here you want to save it as a ‘.wav’ file. Change that if you want to save it in another format.

audiowrite(filename,y,Fs) writes a matrix of audio data, y, with sample rate Fs to a file called filename. The filename input also specifies the output file format. The output data type depends on the output file format and the data type of the audio data, y.

For example

filename = 'handel.wav';
audiowrite(filename,y,Fs);
clear y Fs

Read the data back into MATLAB using audioread.

[y,Fs] = audioread(filename);

Listen to the audio.

sound(y,Fs);

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