Rossum Electro-Music Evolution Variable Character Ladder Filter

At the core of the EVOLUTION Variable Character Ladder Filter is Dave Rossums enhancement of the iconic Moog ladder filter from the original E-mu Systems 2100 LPF module (which, incidentally, Dave counts as his favorite sounding of all of the analog filters he designed).

For EVOLUTION, Dave has designed new capabilities that not only allow you to dial in all of the outstanding qualities of the original 2100, but combine to let you create the sonic characteristics of a wide variety of other filter types.

They include:

• A Genus control that allows continuous voltage control of the number of filter poles (from 3 to 6 poles), essentially allowing real-time variation of Evolutions effective cutoff slope from 18dB/oct to 36dB/oct. LEDs give continuous indication of the current slope.

• A Species control that lets you vary the signal level into the ladder, letting you control the intensity of the filters characteristic d