Yamaha SPX90

The Yamaha SPX90 is a MIDI-controlled rack-mounted digital multi-effects processing unit, first launched in 1985. It is one of the most revered and sought after multi-effects units, providing natural reverb, echo, delay, chorus, pitch changing, flanging, noise gates and many more in 30 presets. There's also memory for an maximum of 60 programs to be made by users.

The SPX90 was one of Tony's preferred rack-mounted processors. His earliest use of the device was the marimba hook of "Tonight, Tonight, Tonight", treating the Akai S612 sample to create an atmosphere that resembled the sound of breaking milk bottles, for example. He'd go on to use it on the Invisible Touch and We Can't Dance tours.