Hello! I am using Csound Version 4.24.1 with 32 bit floats (Mar 22 2005) (Modifications by Istvan Varga). The "advance" statement does not function or I am doing something wrong. I uploaded a simple example.[1] csound produces something different. Thanks for any answer. Alexandros [1] http://www.mathematik.hu-berlin.de/~droselti/1.orc http://www.mathematik.hu-berlin.de/~droselti/1.sco