, ▁which ▁was ▁mixed ▁by ▁Mark ▁Lin ett ; ▁highlight s ▁from ▁the ▁tracking ▁dates , ▁which ▁documents ▁the ▁progress ▁of ▁the ▁recording ▁of ▁the ▁instrument al ▁track ; ▁the ▁finished ▁instrument al ▁track ; ▁an ▁a ▁c app ella ▁mix ▁of ▁the ▁song ; ▁an ▁alternate ▁version , ▁with ▁a ▁sa x oph one ▁solo ; ▁another ▁alternate ▁version ▁with ▁an ▁a ▁c app ella ▁tag ; ▁and ▁a ▁version ▁with ▁Brian ▁on ▁the ▁lead ▁vocals . ▁ ▁Live ▁record ings ▁appear ▁on ▁three ▁of ▁the ▁band ' s ▁albums : ▁Live ▁In ▁London ▁( 1 9 7 0 ), ▁Good ▁Tim in ': ▁Live ▁at ▁K ne b worth ▁England ▁ 1 9 8 0 ▁( 2 0 0 2 ), ▁and ▁Live ▁– ▁The ▁ 5 0 th ▁An ni versary ▁Tour ▁( 2 0 1 3 ). ▁As ▁solo ▁artists , ▁Brian ▁released ▁live ▁versions ▁of ▁the ▁song ▁on ▁Live ▁at ▁the ▁Ro xy ▁Theatre ▁( 2 0 0 0 ) ▁and ▁Pet ▁S ounds ▁Live ▁( 2 0 0 2 ); ▁Al ▁J ard ine ▁released ▁a ▁live ▁version ▁on ▁Live ▁in ▁Las ▁Veg as ▁( 2 0 0 1 ). ▁ ▁Leg acy ▁and ▁acc laim ▁ ▁Author ▁Barry ▁Mil es ▁wrote ▁that ▁it ▁was ▁one ▁track ▁of ▁Pet ▁S ounds ▁which ▁proved ▁that ▁rock ▁music ▁was ▁an ▁art ▁form . ▁Sound ▁engineer ▁Eug ene ▁Ge art y ▁called ▁" G od ▁Only ▁Kn ows " ▁a ▁perfect ▁example ▁of ▁" how ▁much ▁[ B rian ]