Thanks for response Lazarus the 2nd. I do have many midi files which I play as you say using Media player etc.but I have 4 programmes 'The Pianist', 'The Blues Pianist', 'The Jazz Pianist' and 'The Bluegrass Band'. These 4 programmes together play over 1000 tunes, and can manipulate each tune it plays. In other words each is a stand-alone prog. and cannot play any other tunes. Hence my question.