▁in ▁ 1 9 6 5 ▁with ▁electronic ▁musical ▁instruments , ▁synth es izers ▁and ▁t ape ▁loops . ▁In ▁the ▁ 1 9 7 0 s ▁he ▁met ▁producer ▁Ok ko ▁Bek ker , ▁and ▁the ▁two ▁formed ▁a ▁dec ades - long ▁partners hip . ▁Peter ▁Ba umann ▁( of ▁T anger ine ▁Dream ) ▁heard ▁a ▁recording ▁of ▁T iet ch ens ' ▁music ▁and ▁offered ▁to ▁produce ▁an ▁album ; ▁the ▁result ▁was ▁Nach t st ücke , ▁T iet ch ens ' ▁ 1 9 8 0 ▁offering ▁on ▁E gg ▁Records . ▁His ▁early ▁record ings ▁feature ▁more ▁accessible ▁synth es ized ▁music , ▁but ▁beginning ▁with ▁Form en ▁Let zer ▁Haus mus ik , ▁his ▁ 1 9 8 4 ▁release ▁for ▁Nur se ▁With ▁W ound ' s ▁label ▁United ▁D ai ries , ▁he ▁began ▁moving ▁toward ▁more ▁abstract ▁sound ▁coll ages . ▁He ▁has ▁taught ▁ac oust ics ▁in ▁Hamburg ▁since ▁ 1 9 9 0 . ▁ ▁Disc ography ▁▁ 1 9 7 8 ▁Lil ient al ▁with ▁Lil ient al ▁▁ 1 9 8 0 ▁Nach t st ücke ▁▁ 1 9 8 1 ▁Bi ot op ▁▁ 1 9 8 1 ▁Musik ▁aus ▁der ▁Gra uz one ▁▁ 1 9 8 2 ▁Sp ät - E uropa ▁▁ 1 9 8 2 ▁In ▁die ▁Nach t ▁▁ 1 9 8 2 ▁Musik ▁im ▁Sch atten ▁▁ 1 9 8 2 ▁Musik ▁an ▁der ▁Gren ze ▁▁ 1 9 8 3