C# m9 Chord on Octave Mandolin
Play C# m9 on Octave Mandolin: diagrams, finger positions, intervals, and every voicing up and down the neck for this instrument.
The C# m9 chord is a minor extended chord that stacks higher tensions over a minor-seventh foundation. It is built from the notes C#, D#, E, G#, B. This page shows how to play C# m9 on Octave Mandolin with clear fretboard diagrams and suggested finger positions.
The shape nearest the nut leaves the E course open and takes the rest at fret 6, reaching across 4 frets. C# falls on the G course. It sounds from C#3 up to E4.
Octave Mandolin is strung in four courses of two, so each stopped note here sounds as two — which is why the shape rings thicker than the same grip on a single-strung instrument.
Browse alternate voicings to find the one that sits best under your fingers, then compare it with the other chord types built on C# or explore the same shape in nearby keys. The diagrams list the notes in each voicing so you can connect the shape to the theory behind it.