This application can be useful to understand how to use microphone (and timer) and how to record.
Just execute the file, then click "test" and say a word (wait 1 second) say another word, etc.
you can save and load the database.
I used this software for voice recognition but I only left the recorder part in this file.
Download apps, toolboxes, and other File Exchange content using Add-On Explorer in MATLAB.