Lub Hulusi tsuas muaj ib qho octave hauv nws qhov ntau. Lub siab tshaj plaws ntawm cov tsoos Hulusi tsuas yog "middle note 6". Yog tias koj xav ntxiv "high note 1", nws yog qhov ua tau, thiab nws kuj tseem ua tau yam tsis tau ntxiv cov yuam sij, tab sis tus ntiv tes yuav tsum tau hloov. Tsis tas li ntawd, Hulusi yog ib qho cuab yeej ntaus ntawv nrog ib lub reed. Lub nra ntawm lub reed twb hnyav txaus, yog li nws tsis yooj yim rau nce qhov ntau, thiab lub cav ntoo tsis zoo li yav dhau los. Tsis tas yuav nce qhov ntau ntxiv rau lub sijhawm.
Hulusi muaj qhov txwv, tsuas yog ib qho octave xwb. Nws tuaj yeem ua si ntses bass thaj tsam 3, 5, 6, 7 thiab nruab nrab sau ntawv 1, 2, 3, 4, 5, 6. Bass 3 siv huab cua tsis muaj, thiab 4 siv hla ntiv tes.
Thaum koj tau kawm txog ib qib, Hulusi nrog ib lub suab tsis tuaj yeem ua tau raws li koj qhov kev xav tau.