F(♯4) 5-string bass chord

How to play F(♯4) on 5-string bass

The most common way, the first shape above: your index finger on the E string at the 1st fret. Let the B and A strings ring open. Don’t play the D and G strings.

From the B string 0 1 0 x x (x: not played, 0: open)

What notes are in F(♯4)?

F(♯4), F major with sharp four, no fifth, is F, A and B: the root (F), the major third (A) and the augmented fourth (B). Its formula is 1 3 ♯4.