The Moog Taurus bass pedal synth was a totally unique product (then and now) in that it was a simple bass synth that could be played with the feet.

The Taurus was originally planned as a component of a big synth system called 'Constellation' comprising the 'Apollo' (later to become the PolyMoog) for chords, the 'Lyra' for melodies and the Taurus pedals for bass accompaniment and the proposed system was not unlike some huge (and expensive!) hi-tech organ. Of course, this system never really saw the light of day but the PolyMoog and Taurus were sold separately instead (whatever happend to the 'Lyra'?!).