F# 7b5 Chord on Octave Mandolin
How to play the F# 7b5 chord on Octave Mandolin: fretboard diagrams, finger positions, the notes that build it, and alternate voicings up the neck.
The F# 7b5 chord is an extended or altered dominant that stacks ninths, elevenths, thirteenths, or chromatic tensions over a dominant-seventh core. It is built from the notes F#, A#, C, E. This page shows how to play F# 7b5 on Octave Mandolin with clear fretboard diagrams and suggested finger positions.
The E string ring open in the lowest shape, with the remaining notes fretted at fret 3 over a 2-fret stretch. F# falls on the D string. It sounds from A#2 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 F# 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.