As I understand it, from a simple Google search, WordPress - the software - will allow the use of any add-in software to play music files. A number of these will play only MP3/4 and such like, but some I understand will play midi files. One of these will in turn need to be linked to the midi mapper on your PC, I assume, to get at the sounds, I doubt that the application can do everything. The problem I assumed WAS that WordPress - the site/host - places restrictions on loading such add-ins. You'll need to find such a prog that does play midi files, and then set things up on your PC so that it can play. I assume you CAN play midi files not, directly, on your machine (i.e. NOT thru the web)?