Hi! I think with some of the older synths there is a problem: they do a handshake. So there needs to be some exchange between the synth and the computer. With newer devices it usually works the simple way. I don't know how similar the gr50 is to the d50, but if they reasonably similar, then Frank Neumann has a small oss solution. Also it has been a wish of mine for quite some time to implement a mididumper. But I will have to get in on it. It's fairly simple, but I'm a novice in programming. Kindest regards Julien Julien Patrick Claassen jclaassen@xxxxxx julien@xxxxxxxx http://www.geocities.com/jjs_home SBS C-LAB Fuerstenallee 11 33102 Paderborn Phone: (+49) 5251 60 6060 Fax: (+49) 5251 60 6065 www.c-lab.de