Alphabetical grouping by letters' set?

[sason]

Hello,

I am using Minimserver for a couple of days with Asustor and Marantz network player.
I would like to know if there is any way to sort items (Albums, Artist, Titles etc.) in groups of letters (A-D, E-G...) instead of groups of a single letter as in the 'alphagroup' option.

I hope my question is clear.

Thank you for the great software.