I agree with Marvin. Route the 001 monitor outs to either a couple of input channels on the 1604 or, if it has an external mixer input (or aux input), use that. When you need to record your midi instruments, route them through the Alt 3/4 output (connect the alt 3/4 output to the 001 inputs 3 & 4). You can then create an aux channel in PTLE to record just what you select to alt 3/4 - and they won't come through the mixer's monitors. A mixer still has a lot more flexibility than the 001. ------------------ LW [This message has been edited by lwilliam (edited April 24, 2000).]