F(♯4) 8-string bass chord

How to play F(♯4) on 8-string bass

The most common way, the first shape above: your index finger on the B string at the 6th fret, your middle finger on the E string at the 7th fret, your little finger on the A string at the 8th fret and your ring finger on the D string at the 7th fret. Don’t play the F♯, G, C and F strings.

From the F♯ string x 6 7 8 7 x 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.