I wonder if linear models of the classic tube EQs are really sufficient to recreate their special character ... or if they needed to go to non-linear models. A non-linear approach would add a whole level of complexity to the system, the outboard would need to be probed at many amplitude levels, and the amplitude level of the input of each cloned EQ would need to be monitored, etc. --- John Lazzaro http://www.cs.berkeley.edu/~lazzaro lazzaro [at] cs [dot] berkeley [dot] edu ---