pler ▁( mus ical ▁instrument ) ▁ ▁S ync lav ier ▁( 1 9 7 5 ), ▁Jon ▁App leton , ▁Sydney ▁A . ▁Al onso ▁and ▁Camer on ▁Jones ▁ ▁Tel harm on ium ▁( 1 8 9 7 ), ▁Th ad de us ▁C ah ill ▁ ▁Th erem in ▁( 1 9 2 8 ), ▁Lé on ▁Th erem in ▁ ▁T utt iv ox ▁( 1 9 5 3 ), ▁Har ald ▁B ode ▁ ▁U PI C ▁( 1 9 7 7 ), ▁I ann is ▁X en ak is ▁and ▁CE MA M u ▁ ▁War bo ▁Form ant ▁organ ▁( 1 9 3 7 ), ▁Har ald ▁B ode ▁ ▁Cent ers , ▁associations ▁and ▁events ▁for ▁electro ac oust ics ▁and ▁related ▁arts ▁Import ant ▁cent ers ▁of ▁research ▁and ▁composition ▁can ▁be ▁found ▁around ▁the ▁world , ▁and ▁there ▁are ▁numerous ▁con ferences ▁and ▁festiv als ▁which ▁present ▁electro ac oust ic ▁music , ▁not ably ▁the ▁International ▁Computer ▁Music ▁Conference , ▁the ▁International ▁Conference ▁on ▁New ▁interfaces ▁for ▁musical ▁expression , ▁the ▁Elect ro ac oust ic ▁Music ▁Studies ▁Conference , ▁and ▁the ▁Ar s ▁Electron ica ▁Festival ▁( Lin z , ▁Austria ). ▁ ▁A ▁number ▁of ▁national ▁associations ▁promote ▁the ▁art ▁form , ▁not ably ▁the ▁Canadian ▁Elect ro ac oust ic ▁Community ▁( CE C ) ▁in ▁Canada , ▁the ▁Society ▁for ▁Elect ro - Ac oust ic ▁Music ▁in ▁the ▁United ▁States ▁( SE AM US ) ▁in ▁the