▁Griff es : ▁Collect ed ▁Works ▁for ▁P iano ▁Track ▁listing ▁for ▁John ▁Ald en ▁Car p enter : ▁Collect ed ▁P iano ▁Works ▁Track ▁listing ▁for ▁R . ▁Nathan iel ▁D ett : ▁P iano ▁Works ▁Track ▁listing ▁for ▁John ▁Know les ▁Pa ine : ▁Selected ▁P iano ▁Works ▁Track ▁listing ▁for ▁William ▁Grant ▁Still , ▁R . ▁Nathan iel ▁D ett : ▁P iano ▁Music ▁Track ▁listing ▁for ▁Jacques ▁I bert : ▁P iano ▁Works ▁Track ▁listing ▁for ▁Ang elo ▁Mus ol ino : ▁Or ch est ral ▁Works ▁ ▁Category : American ▁classical ▁pian ists ▁Category : American ▁male ▁pian ists ▁Category : A sp en ▁Music ▁Festival ▁and ▁School ▁al umn i ▁Category : J u illi ard ▁School ▁al umn i ▁Category : L iving ▁people ▁Category : 1 9 3 6 ▁birth s ▁Category : 2 0 th - century ▁American ▁pian ists ▁Category : 2 1 st - century ▁classical ▁pian ists ▁Category : 2 0 th - century ▁American ▁male ▁mus icians ▁Category : 2 1 st - century ▁American ▁male ▁mus icians ▁Category : 2 1 st - century ▁American ▁pian ists <0x0A> </s> ▁Philip ▁C . ▁Hay den ▁( 1 8 5 4 – 1 9 2 5 ) ▁was ▁the ▁primary ▁force ▁in ▁organ izing ▁the ▁Music ▁Super vis ors ▁National ▁Conference , ▁later ▁the ▁Music ▁Edu c ators ▁National ▁Conference ▁( M EN C ). ▁He ▁was ▁appointed ▁the ▁first ▁super visor ▁of ▁music ▁in ▁Qu in cy , ▁Illinois ▁in