icians ▁are ▁expected ▁to ▁be ▁able ▁to ▁select ▁and ▁perform ▁sty list ically ▁appropriate ▁fills ▁from ▁a ▁collection ▁of ▁stock ▁fills ▁and ▁phr ases . ▁" Al though ▁it ▁is ▁a ▁small ▁break ▁in ▁the ▁pattern , ▁the ▁tempo ▁is ▁not ▁changed ▁at ▁all , ▁and ▁in ▁most ▁instances ▁the ▁time - keep ing ▁pattern ▁is ▁res umed ▁immediately ▁after ▁the ▁fill ... An ▁important ▁point ▁to ▁remember ▁is ▁that ▁the ▁flow ▁of ▁the ▁music ▁should ▁not ▁be ▁sacrific ed ▁to ▁the ▁technical ity ▁of ▁the ▁fill ." ▁ ▁Ch ord al ▁fills ▁on ▁guitar ▁or ▁keyboard ▁instruments ▁are ▁" groups ▁of ▁single ▁notes ▁played ▁within ▁the ▁context ▁of ▁a ▁specific ▁ch ord " ▁to ▁" produ c [ e ] ▁a ▁counter mel ody ." ▁A ▁guitar ist ▁playing ▁ch ord al ▁fills ▁will ▁str um ▁the ▁ch ord ▁for ▁several ▁str ums ▁and ▁then ▁interpol ate ▁several ▁passing ▁notes ▁that ▁lead ▁to ▁the ▁next ▁ch ord . ▁ ▁Trad ition ▁and ▁impro vis ation ▁ ▁In ▁some ▁styles , ▁such ▁as ▁jazz ▁or ▁jazz ▁fusion , ▁mus icians ▁have ▁more ▁freedom ▁to ▁improv ise ▁fill ▁pass ages ▁each ▁time ▁a ▁piece ▁or ▁song ▁is ▁performed . ▁In ▁other ▁styles , ▁such ▁as ▁bl u egr ass , ▁perform ers ▁are ▁more ▁likely ▁to ▁use ▁standard ▁" walk up " ▁or ▁" walk down " ▁scalar ▁pass ages ▁as ▁fills ▁in ▁every ▁song . ▁Some ▁groups ▁use ▁previously ▁composed ▁fills ▁as ▁part ▁of ▁the ▁identity ▁of ▁a ▁song . ▁The ▁E ag