Hello, Im an Spanish new user for the privia pro px-5s, I love the keyboard, its very good, but..... I have got a good sustain Roland pedal without polarity switch, normally in other keyboards, has the function to change the polarity in the keyboards settings, but in this casio its not possible. Other question is why I must to rename my WAV files to "take00.........." ? If i have many files, Its very difficult to see what is the song. Its is possible include this functions in a new firmware update? Thank you