▁difficult . ▁ ▁The ▁second ▁composition , ▁" D rift ▁Study ▁ 1 4 ▁VII ▁ 7 3 ▁ 9 : 2 7 : 2 7 – 1 0 : 0 6 : 4 1 ▁PM ▁NY C ▁( 3 9 " ▁ 1 4 ") ", ▁is ▁played ▁entirely ▁by ▁s ine ▁wave ▁gener ators . ▁Fre qu encies ▁and ▁volt ages ▁of ▁the ▁s ine ▁waves ▁gener ators ▁were ▁determined ▁and ▁tun ed ▁by ▁La ▁Monte ▁Young ▁using ▁oscill ators ▁custom - des igned ▁by ▁sound ▁engineer ▁Robert ▁Ad ler ▁to ▁generate ▁specific ▁frequencies ▁and ▁volt ages ▁of ▁great ▁stability . ▁ ▁Dream ▁House ▁environment ▁By ▁ 1 9 6 3 , ▁La ▁Monte ▁Young ▁had ▁form ulated ▁the ▁concept ▁of ▁a ▁Dream ▁House , ▁which ▁he ▁defined ▁as ▁" work ▁that ▁would ▁be ▁played ▁continu ously ▁and ▁ultimately ▁exist ▁as ▁a ▁' l iving ▁organ ism ▁with ▁a ▁life ▁and ▁tradition ▁of ▁its ▁own ' ". ▁Young ' s ▁first ▁continuous ▁electronic ▁sound ▁environment ▁was ▁created ▁in ▁his ▁lo ft ▁on ▁Church ▁Street , ▁New ▁York ▁City ▁in ▁September ▁ 1 9 6 6 ▁( where ▁he ▁still ▁lives ▁and ▁where ▁the ▁Dream ▁House ▁still ▁exists ) ▁with ▁s ine ▁wave ▁gener ators . ▁This ▁environment ▁was ▁maintained ▁almost ▁continu ously ▁from ▁September ▁ 1 9 6 6 ▁to ▁January ▁ 1 9 7 0 , ▁being ▁turned ▁off ▁only ▁to ▁listen ▁to ▁" other ▁music " ▁and ▁to ▁study ▁the ▁contrast ▁between ▁extended ▁periods ▁in ▁it ▁and ▁periods ▁of