Ƙananan ƙarami, ƙararrawa da raguwar waƙoƙi na bakwai (Darasi na 10)

Don haka mu ci gaba. A darasin da ya gabata, mun yi magana game da manya da ƙananan manyan mawaƙa na bakwai. Hanya mafi kyau don koyan yadda ake gina duk wasu nau'ikan mawaƙa na bakwai shine a yi tunanin su azaman gyare-gyaren clone na ƙaramin babban maɗaukakin bakwai, ko maɗaukakin maɗaukaki na bakwai (kamar yadda ake kira shi).

Ƙananan ƙarami na bakwai

Don samun ƙaramin ƙarami na bakwai daga Do (Cm7), kuna buƙatar saukar da Mi, ko na uku, da rabin sautin a cikin ƙaramin ƙarami na bakwai (mafi rinjaye na bakwai) daga Do (C7) kuma juya shi zuwa E-flat; kun riga kun yi wannan, daga triad a C manyan (C) zuwa C ƙananan (Cm).

Wataƙila kuna tsammanin za a gina ƙaramin maɗaukaki na bakwai a saman babban maɗaukaki na bakwai wanda ya kamata a saukar da na uku a ciki. Haka ne, kun yi gaskiya: ilimin kida a cikin wannan yanayin ya ɗan gurguje, amma akwai wani bangare mai ban sha'awa ga duk wannan: idan muka ɗauki maɗaukakin maɗaukaki na bakwai a matsayin tushen mabambantan ƙididdiga na bakwai, to, ƙa'idodin gina ƙananan ko ƙarami. gaba daya yayi daidai da ka'idojin triads masu dacewa. (Sai dai kawai shine raƙuman maƙallan bakwai; duk da haka, gininsa yana da ma'ana sosai kuma ba za ku sami matsala tare da shi ba.)

Kunna nau'ikan ƙananan ƙananan waƙoƙi na bakwai daban-daban, ku saba da sabon sautinsa mai ban sha'awa.

Yana jin daɗi sosai a cikin ayyuka inda akwai ƙaramin triad kawai. Gwada maye gurbin shi da maƙarƙashiya na bakwai kuma za ku ga yadda ɓangaren kiɗan zai kunna ta sabuwar hanya. Bari mu ɗauki aƙalla waƙar daga "Umbrellas na Cherbourg" da kuka saba da ku, bari mu yi ƙoƙarin ƙara ɗan launi zuwa gare shi:

 Ƙarfafa ƙira ta bakwai

A cikin wakokin zamani ƙara ta bakwai suna da wuya. Ya ƙunshi faɗaɗa triad, wanda aka ƙara ƙaramin na bakwai daga babban sautin. Wato idan muka dauki karamar babbar murya ta bakwai, muka daga sautin na biyar a cikinta da rabin sautin, to za mu sami karuwa ta bakwai.

Dangane da nawa kuka ƙware a ƙa'idar gina ƙaƙƙarfan maɗaukaki na bakwai, kunna yawancin waɗannan waƙoƙin kamar yadda kuke ganin ya cancanta. Ga wasu daga cikin waɗancan waƙoƙin:

Rage waƙa ta bakwai

Yanzu mun matsa zuwa na ƙarshe kuma watakila mafi ƙanƙanta na maɗaukaki na bakwai - rage. A matsayin tushen gininsa, kuma, yana da kyau a yi amfani da ƙaramin ƙaramin maɗaukaki na bakwai (mafi rinjaye na bakwai). Kuna buƙatar saukar da na uku, na biyar da na bakwai, kamar haka:

Ba zato ba tsammani, yana da ban sha'awa a lura cewa raguwar lambobi na bakwai da ke sama su ne duk ya kamata ku saba da su. Rage ragowar maƙallan bakwai na tara sun ƙunshi bayanin kula iri ɗaya da waɗannan ukun. Alal misali, Gdim7 ya ƙunshi bayanin kula G, B flat, D flat da E, wato, rubutu iri ɗaya da Edim7, amma a wurare dabam dabam; Ebdim7 ya ƙunshi bayanin kula iri ɗaya da Cdim7 (E-flat, G-flat, A da C), kuma yana gudana.

Kowace daga cikin ukun uku da aka rage na bakwai maɗaukaki na sama za a iya buga ta hanyoyi hudu, juya kowane bayanin kula zuwa tushen bi da bi; a cikin duka, ana samun maɓalli na bakwai daban-daban goma sha biyu, wato, duk mai yiwuwa. Wannan ita ce kawai ƙwanƙwasa inda kowane bayanin kula za a iya juya shi zuwa tushe, kuma ta yadda duk sauran bayanan su kasance iri ɗaya ne, kuma gabaɗayan maƙarƙashiyar ta kasance iri ɗaya ta rage ta bakwai!

Misali na gaba zai taimake ka ka fahimci ma’anar abin da aka faɗa. Kunna duk waƙoƙin da aka bayar anan: Komai yana kama