D(♯4) 7-string bass chord

How to play D(♯4) on 7-string bass

The most common way, the first shape above: your index finger on the G string at the 1st fret, your ring finger on the C string at the 2nd fret and your middle finger on the F string at the 1st fret. Let the D string ring open. Don’t play the B, E and A strings.

From the B string x x x 0 1 2 1 (x: not played, 0: open)

What notes are in D(♯4)?

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