So I have a Casio AP-10 and I am trying to connect it to my laptop over midi. It won't send a signal to the laptop. I noticed there is a button which says transpose, tune, and midi, so I am assuming I need to incorporate that button somehow. A Casio technician told me to post on this forum. If someone can help me with this or can send me a user manual, NOT SERVICE MANUAL, for this piano that would be amazing. Iv looked everywhere its driving me crazy. Its a very old piano