That's exactly what the other fellow forum member in this thread told me. But as I told him, you have to make sure that just changing the extension will work. You are the second one who tells me this. As I said to another colleague, the keyboard is not within my reach, it belongs to a cousin who lives far away. I'm doing you a favor to try to guide you in using these files so that it can work. That from what it seems to me, from what I remember when I was with him and had access to the keyboard, the keyboard only accepted .smf format. But for me to pass this guidance on to him, just change the extension of the .mid files to .smf and that way he'll do it, he needs to be sure. So he doesn't get disoriented. Please, I will ask you to be sure and to reflect on the answer you will give me. That's right ?