The Rossum Electro-Music Morpheus is a digital 14-pin stereo morphing Z-plane filter in Eurorack format, originally developed for the legendary E-mu Morpheus synthesizer. Morpheus includes more than 280 filter configurations, also known as cubes. A filter sequencer allows jumping through an ordered filter list.

Rossum Electro-Music Morpheus: Cubes

The filter configurations of the Rossum Morpheus are called cubes. A configuration consists of a composition of up to eight complex filters that you have to imagine as the corners of a three-dimensional cube. Morpheus offers the possibility to interpolate between the filters within three-dimensional space. Due to the processor limitations of the time, Morpheus' original real-time morphing could only be realised in one dimension, while the other two parameters, frequency and transform, remained static. With the Morpheus Filter Module, all three parameters can now be controlled simultaneously in real time via control voltages. This creates an unmistakable and unique filter sound with dynamic timbre effects - in stereo.