2 , ▁although ▁Horn s by ▁still ▁sat ▁in ▁with ▁the ▁band ▁on ▁occasion . ▁ ▁Horn s by ' s ▁own ▁music ▁evol ved ▁significantly ▁during ▁this ▁time ▁period . ▁Crit ics ▁have ▁suggested ▁that ▁the ▁Dead ' s ▁v ibr ant ▁tradition ▁of ▁m eld ing ▁folk ▁music ▁and ▁the ▁bl ues ▁with ▁psych ed el ic ▁rock ▁in ▁ ▁" lo ose - kn it ▁expressions " ▁and ▁extended ▁jam ming ▁" fur ther ▁pushed ▁[ H orn s by ] ▁outside ▁the ▁conf ines ▁of ▁main stream ▁pop ". ▁ ▁Crit ics ▁have ▁also ▁commented ▁upon ▁the ▁" close ▁musical ▁connection " ▁formed ▁between ▁Horn s by ▁and ▁Jerry ▁Gar cia , ▁suggesting ▁that ▁Horn s by ' s ▁particular ▁style ▁of ▁jazz - f ue led ▁impro vis ation ▁added ▁to ▁the ▁band ' s ▁re per toire , ▁and ▁helped ▁to ▁rev ital ize ▁and ▁ref ocus ▁Jerry ▁Gar cia ' s ▁guitar ▁sol os ▁in ▁the ▁band ' s ▁sound . ▁ ▁Horn s by ' s ▁friendship ▁with ▁Gar cia ▁continued , ▁both ▁inside ▁and ▁outside ▁the ▁band , ▁as ▁the ▁two ▁" ch alleng ed " ▁each ▁other ▁to ▁expand ▁their ▁mus icians hip ▁through ▁several ▁other ▁album ▁and ▁live ▁collabor ations . ▁ ▁A bove ▁all , ▁Horn s by ' s ▁musical ▁vers at ility ▁and ▁ability ▁to ▁s lip ▁in ▁and ▁out ▁of ▁extended ▁free form ▁j ams ▁won ▁over ▁long time ▁Gr ateful ▁Dead ▁fans . ▁ ▁Since ▁his ▁first