I've been trying to download midi files but each time when I play these files, its speed is too fast. There isn't any options for me to slow down the speed.

Anyone can help? Both my 7230 device and BES are running on the 4.0.

you would have to edit the midi file yourself and alter the tempo. this was require software. emagic logic (made by apple) and cubase sx (made by steinberg) are some midi editors. check the files on your computer and make sure they are incorrect, though. i've never had issues downloading midi files and them sounding different on the phone.