how do I convert a string answer into a readable audioread

I want to create a game where users can upload audiofiles and play them at the same volume.

To upload the audiofiles, so far I have tried:

X_1 = input('First song: ','s');

[DJ_Music{1},Fs] = audioread('X_1''.m4a');

However, this gives an error everytime I fill in the audiofile name, does anyone have tips?

It probably has something to do with the string and characters formation?

Answer 1

[Walter Roberson]

X_1 = input('First song: ','s');

[DJ_Music{1},Fs] = audioread([X_1 '.m4a']);

[C Hart]

thank you so much! :)