ra . ▁Il ia ' s ▁second ▁aria ▁contains ▁a ▁four - part ▁ob bl ig ato ▁for ▁fl ute , ▁ob oe , ▁bass oon ▁and ▁horn , ▁composed ▁by ▁Moz art ▁for ▁Wend ling ▁and ▁his ▁colle agues . ▁ ▁Wend ling ▁was ▁also ▁active ▁as ▁a ▁fl ute ▁teacher , ▁not ▁only ▁of ▁noble ▁am ateurs ▁but ▁also ▁of ▁the ▁next ▁generation ▁of ▁profession als . ▁His ▁most ▁notable ▁pup ils ▁were ▁Duke ▁Christian ▁IV ▁of ▁Deux - P ont s , ▁Elect or ▁Carl ▁The odor ▁of ▁Mann heim , ▁the ▁Duke ▁of ▁Gu ines , ▁Johann ▁Bapt ist ▁Be cke , ▁Johann ▁Georg ▁Met z ger , ▁Johann ▁Nikol aus ▁Her oux ▁and ▁Jakob ▁Heinrich ▁App old . ▁ ▁As ▁described ▁by ▁his ▁contempor aries ▁▁ ▁The ▁Moz art ▁family ▁heard ▁Wend ling ▁play ▁in ▁a ▁concert ▁in ▁Schw etz ingen ▁on ▁ 1 8 ▁July ▁ 1 7 6 3 . ▁Leopold ▁Moz art ▁wrote ▁the ▁next ▁day : ▁ ▁" I ▁had ▁the ▁pleasure ▁to ▁hear , ▁besides ▁good ▁sing ers ▁of ▁both ▁sex es , ▁the ▁ad mi rable ▁fla uto ▁tra verso , ▁Wend ling ." ▁ ▁The ▁German ▁pian ist ▁and ▁poet ▁Christian ▁Friedrich ▁Daniel ▁Sch ub art ▁heard ▁Wend ling ▁in ▁Mann heim ▁in ▁ 1 7 7 3 ▁and ▁later ▁wrote : ▁ ▁" W end ling , ▁an ▁excellent ▁fla ut ist ▁who ▁knows ▁how ▁to ▁combine ▁true ▁principles ▁with ▁finished ▁execution . ▁His ▁performance ▁is ▁clear ▁and ▁beautiful ,