Korg Z1

The Korg Z1 is a synthesizer from 1997 (manufactured until 1999), which uses multiple synthesis forms including physical and analog modelling synthesis.

Peter Gabriel was introduced to the Z1 by synthesizer expert Paul Wiffen, who was working for Korg at the time. He felt the 'Decimate' filter on the synth suited Peter's tastes for crude sounds, so he called up one of Peter's engineers about it. As soon as Paul arrived at the session, he was feeding one of Peter's vocals through the filter to make it more menacing and harsh-sounding (not dissimilar to the Brian Eno treatments on vocals heard on The Lamb Lies Down On Broadway).

Further info

 * Wikipedia