onic ▁and ▁chrom atic , ▁they ▁have ▁different ▁bass ▁systems . ▁These ▁g arm on is ▁basically ▁have ▁ 1 9 ▁bass es , ▁however ▁there ▁also ▁are ▁the ▁ones ▁with ▁ 1 2 , ▁ 1 1 ▁and ▁ 8 ▁bass es . ▁As ▁a ▁rule , ▁T ush et ian ▁g arm oni ▁has ▁ 1 8 ▁di at onic ▁keys . ▁According ly ▁chrom atic ▁instrument ▁has ▁ 1 2 ▁additional ▁sem it one ▁keys . ▁Bass ▁system ▁can ▁also ▁be ▁di at onic ▁or ▁chrom atic , ▁T ush et ian ▁g arm oni ▁has ▁characteristic ▁appearance , ▁but ▁there ▁also ▁are ▁T ush et ian ▁g arm on is ▁with ▁different ▁design . ▁Most ▁Georg ian ▁g arm on is ▁have ▁an ▁interesting ▁sh utter ▁mechanism ▁– ▁a ▁hook ▁and ▁a ▁loop ▁inside ▁the ▁cor pus . ▁It ▁opens ▁when ▁the ▁instrument ▁is ▁moved ▁forward ▁and ▁clos es ▁when ▁moved ▁back . ▁M ini ature ▁di at onic ▁pocket ▁g arm oni ▁( ts iko - ts iko ▁and ▁bu z ika / mu z ika ) ▁which ▁is ▁vis ually ▁similar ▁to ▁Georg ian ▁traditional ▁g arm oni ▁is ▁dis sem in ated ▁in ▁K art li - K ak het i , ▁East ▁Georg ian ▁mountain ous ▁regions ▁and ▁Rach a . ▁B uz ika ▁is ▁a ▁little ▁bigger ▁than ▁Ts iko - ts iko , ▁as ▁a ▁rule , ▁they ▁both ▁have ▁one ▁di at onic ▁oct ave ▁and ▁ 2 - 3 ▁bass es