morse code hearing trainer

Developed this program for reception training use of morse code communication.

In addition, this program is prototype version and inefficient.
So, improving the efficiency of the code now.

How to use
1.unzip file.
2.execution file "morse.m"
3.After GUI stand up, select speed and a tone.
4.push the exec button.
5.After that,choice a text file.
6.Convert characters in the text file to morse code.
Output by the speaker of the PC.

The letter that the handling is possible
alphabet: A to z
number: 0-9
sign:. ,?! - /@()