An entirely switchless waveset MIDI/sequencer synthesizer.
Heidegger doesn't contain any switches, so it's really fast to set up complicated patches, and changing between snapshots never interrupts the sound.
It is a waveset vector synthesizer with two waveset oscillators, noise source, dual morphing serial/parallel filters, parametric overdrive, three complex envelopes, four complex LFOs, MIDI I/O, and tempo delay. The original version had a triple step sequencer and arpeggiator too, but some bug fixes in Reaktor 5 resulted in those parts no longer working. Since then the Husserl and Godel instruments in the Metamusic series provided superior alternatives, so the original sequencer and arpeggiator is removed.
I originally built this ensemble in Reaktor 3 on an 866MHz Pentium3. On that machine it worked find with 6 voices at 44.1kHz. If you have a slower machine, it will probably work fine with 3 voices. You can reduce voice count in the instrument toolbar. Because the ensemble doesn't contain any switches, the sound doesn't fail when you change the voice count, although for CPUs less than 1GHZ it may shudder for awhile if you don't toggle audio off first. Also the ensemble contains a 'cpu' setting which internally divides down the event rate for the continuous sources, such as LFOs and event envelopes. On a 600NHz machine that makes alot of difference.
This ensemble is the legacy of Hobbes Leviathan, the most popular ensemble ever in the Reaktor user library on the Native Instruments site. It had more downloads than 3X, now the number one ensemble in the top 10. However when James Walker Hall was NI product manager for Reaktor there were a series of database errors, resulting in false download counts and difficulties with updating existing ensembles, so the it was only briefly in the top 10.
For reference, please see the Hobbes Leviathan ensemble.