By Denny Dyroff, Entertainment Editor, The Times Soft Machine Any discussion of British bands with impressive longevity has to include Soft Machine. Soft Machine (billed as The Soft Machine up until 1969 or 1970) were formed in mid-1966 by Robert Wyatt (drums, vocals), Kevin Ayers (bass, guitar, vocals), Daevid Allen (guitar) and Mike Ratledge (organ). Allen, Wyatt and future bassist Hugh...