, ▁Pic colo ▁S pole to , ▁St et son ▁University ▁Gu itar ▁Festival , ▁R ut gers ▁University ▁Summer fest , ▁East man ▁Gu itar fest ▁and ▁the ▁Sum mit ▁Music ▁Festival ; ▁and ▁with ▁the ▁New ▁York ▁Contempor ary ▁Music ▁Band , ▁New ▁Music ▁Cons ort , ▁J off rey ▁Bal let ▁Orchestra , ▁and ▁the ▁Washington ▁Bach ▁Cons ort . ▁More ▁recently ▁Mark ▁Del p ri ora ▁has ▁been ▁performing ▁on ▁the ▁bar o que ▁guitar , ▁giving ▁his ▁first ▁all - bar o que ▁guitar ▁rec ital ▁at ▁William ▁Pat erson ▁University ' s ▁ 2 0 0 7 ▁Gu itar ▁Fest . ▁ ▁His ▁compos itions ▁have ▁been ▁published ▁by ▁B è r ben ▁Ed izioni ▁Musical i ▁( the ▁ 5 0 - min ute ▁Son ata ▁No . 3 , ▁Son ata ▁No . 2 , ▁E leg ia ▁per ▁Bas il ▁Ke iser ), ▁Ed itions ▁Or ph ée ▁( T ango ▁C aff è ▁Car ci of o , ▁ 1 0 ▁Short ▁Studies ▁in ▁K ale idos cope , Cre ation ▁F ug ue , ▁ ▁Vari ations ▁on ▁a ▁Th eme ▁of ▁Sor ), ▁and ▁Gu itar ▁Arts ▁Publishing ▁( F our ▁Im ages ▁after ▁a ▁poem ▁by ▁e . e . ▁cum m ings ), ▁Mel B ay ▁( T amb u ▁Fant asy ). ▁All ▁of ▁the ▁above ▁works , ▁particularly ▁the ▁Son at as , ▁are ▁cont rap unt ally ▁complex , ▁dram atically ▁sh aped ▁and ▁techn ically