Qaamuuska muusigga, maxay tahay wareegga shanta?
Wareegtada shantii qeybood waa qaab lagu abaabulo 12ka qaybood ee kala duwan ee kala duwan sida taxane ah shantii qeybood. (Tani waxay si adag u saxsan tahay nidaamka caadiga ah ee 12-tone ee isku midka ah ee isku midka ah <unk> isticmaalka nidaam ka duwan wuxuu u baahan yahay hal xilli oo lixaad oo hoos u dhac ah in loola dhaqmo sida shanaad). Haddii C loo doorto barta bilowga ah, taxanaha waa: C, G, D, A, E, B (= C<unk>), F<unk> (= G<unk>), C<unk> (= D<unk>), A<unk>, E<unk>, B<unk>, F. Sii wadida qaabka laga bilaabo F waxay soo celineysaa taxanaha barta bilowga ah ee C. Amarkan wuxuu dhigayaa saxiixyada muhiimka ah ee ugu dhow ee isku xiran midba midka kale. Waxaa sida caadiga ah lagu sawiray qaab wareeg ah.