Ton-Geraet 1 (Sound Device) was a big hit 10 years ago because of its unconventional feature set. Now the VST plugin for Windows-based DAW’s is being given away completely free of charge.
The instrument features a dual-voice architecture and a beautiful wave-morph sequencing which draws inspiration from the legendary SID sound chip which was used in Commodore 64 home computers.Other features include a 12-bit low-pass filter inspired by the Akai S-1000 hardware sampler. A dual LFO unit is installed for handling modulation, along with per-voice DADSR envelopes. Things get even more interesting with the Kraftwerk inspired Stoerstrahlung (Interference or stray radiation) button (found on the Setup page) which emulates the unstable behaviour of analogue gear.
Kraftwerk used to leave their analogue synthesizer gear running whilst they went out to the cinema. After they returned to the studio, due to the slow internal heating of the analogue circuits, they found the sound to have changed, sometimes drastically.
More info: SyS TG1 (12.9 MB download, ZIP archive containing EXE installer, 32-bit & 64-bit VST plugin format for Windows)