▁seems ▁to ▁be , ▁though ▁they ▁vary ▁the ▁volume ▁with ▁great ▁skill , ▁at ▁times ▁quiet , ▁then ▁turning ▁it ▁up ▁and ▁shout ing ▁at ▁the ▁listener ▁as ▁in ▁" K now ▁Who ▁You ▁Are " ." ▁Joe ▁V ig l ione ▁of ▁All Music ▁ret ros pect ively ▁said : ▁"" K now ▁Who ▁You ▁Are " ▁is ▁a ▁wonderful ▁study ▁here ; ▁the ▁band ▁is ▁more ▁proper ▁di pping ▁into ▁that ▁Y ard bird s ▁bag ▁again ▁on ▁this ▁original . ▁By ▁the ▁time ▁it ▁was ▁re - re leased ▁on ▁S lade ▁A live , ▁only ▁two ▁years ▁later , ▁the ▁song ▁would ▁become ▁part ▁of ▁their ▁gl am ▁success . ▁But ▁here , ▁N od dy ▁H older ▁is ▁kept ▁on ▁key ▁by ▁Ch as ▁Ch and ler , ▁and ▁that ▁rest raint ▁makes ▁for ▁an ▁intellig ent ▁album ▁of ▁rock ▁which ▁draw s ▁from ▁all ▁of ▁the ▁a for ement ioned ▁sources , ▁Ten ▁Years ▁After , ▁S abb ath , ▁The ▁Move , ▁Y ard bird s , ▁as ▁well ▁as ▁the ▁Beat les , ▁Ste ppen w olf , ▁and ▁K ale idos cope ▁U . K ." ▁Dave ▁Sw anson ▁of ▁Ult imate ▁Classic ▁Rock ▁commented : ▁"" K now ▁Who ▁You ▁Are " ▁k icks ▁off ▁side ▁two ▁and ▁remains ▁one ▁of ▁the ▁band ' s ▁fin est - ever ▁songs . ▁Show ing ▁off ▁the ▁band ▁well ▁on ▁the ▁way ▁to ▁their ▁definit ive ▁sound , ▁it ' s ▁a ▁S lade ▁classic