Cdim(maj7) 7-string guitar chord

How to play Cdim(maj7) on 7-string guitar

The most common way, the first shape above: your index finger on the A string at the 3rd fret, your middle finger on the D string at the 4th fret, your middle finger on the G string at the 4th fret and your middle finger on the high B string at the 4th fret. Don’t play the low B, low E and high E strings.

From the low B string x x 3 4 4 4 x (x: not played, 0: open)

What notes are in Cdim(maj7)?

Cdim(maj7), C diminished major seventh, is C, E♭, G♭ and B: the root (C), the minor third (E♭), the diminished fifth (G♭) and the major seventh (B). Its formula is 1 ♭3 ♭5 7.