OT: chord naming question

[Marc Hohl]

Hi list,

as there are already (partly very emotional) dicussions concerning
F# vs. Gb in another (hijacked) thread,
https://lists.gnu.org/archive/html/lilypond-user/2016-05/msg00418.html
I hope to get some information *without* starting a flame war ;-)

I have the following chord played on a guitar, see the attached image.

< c-sharp g-sharp b-sharp e' b'>

It starts as a c minor chord with a major 7, so I'd call it cmmaj7, but
the added b' is the minor seventh.

cm7maj7 does not look quite right, so should the b' be written as an
a'-doublesharp, to call it cmmaj7#13?

Thanks in advance!

Regards,

Marc

cmmaj7.png
Description: PNG image