▁of ▁ 1 9 7 6 ▁and ▁left ▁Van ▁der ▁Gra af ▁Gener ator ▁to ▁work ▁on ▁the ▁development , ▁design ▁and ▁installation ▁of ▁electronic ▁church ▁org ans ▁for ▁the ▁Mak in ▁Or g ans ▁company ▁in ▁Old ham , ▁Lanc ash ire , ▁where ▁he ▁became ▁Techn ical ▁Director . ▁In ▁ 1 9 9 2 ▁he ▁set ▁up ▁his ▁own ▁company ▁The ▁Organ ▁Work shop ▁at ▁L ym m ▁in ▁Ch esh ire , ▁and ▁latter ly ▁in ▁E ves ham , ▁Wor c esters hire . ▁His ▁org ans ▁use ▁digit ally ▁generated ▁wave forms ▁to ▁em ulate ▁the ▁sound ▁of ▁pipe ▁organ ▁stops , ▁and ▁a ▁recent ▁special ity ▁is ▁combining ▁digit ally ▁generated ▁organ ▁stops ▁within ▁conventional ▁wind - dri ven ▁pipe ▁org ans , ▁to ▁create ▁a ▁larger ▁hy brid ▁instrument . ▁His ▁company ▁have ▁installed ▁org ans ▁of ▁all ▁sizes ▁both ▁in ▁the ▁UK ▁and ▁abroad . ▁ ▁Since ▁the ▁re union ▁of ▁Van ▁der ▁Gra af ▁Gener ator ▁in ▁ 2 0 0 5 ▁he ▁has ▁regularly ▁contributed ▁to ▁concert s ▁and ▁record ings ▁with ▁former ▁members , ▁which ▁continues ▁as ▁a ▁tri o ▁with ▁Peter ▁Hamm ill ▁and ▁Guy ▁Evans . ▁ ▁Disc ography ▁ ▁Solo ▁ ▁J . S . ▁Bach ▁- ▁The ▁Gold berg ▁Vari ations ▁( organ ) ▁( 2 0 0 3 ) ▁ ▁Gustav ▁Hol st ▁- ▁The ▁Plan ets ▁( organ ) ▁( 2 0 0 9 ) ▁J . S . ▁Bach ▁- ▁H B ▁plays ▁J