I am using the acro package to introduce acronyms with appropriate citations. I am almost able to get what I need, but with one small issue.
I would like to introduce acronyms in the form "Helioseismic and Magnetic Imager (HMI; Scherrer et al., 2012)", but so far with the acro package, I have only been able to get "Helioseismic and Magnetic Imager (HMI, Scherrer et al., 2012)" -- i.e., with a comma separating the acronym and the citation instead of a semicolon.
Here is my working example:
\documentclass{article}
\usepackage{filecontents}
\begin{filecontents*}{bibliography.bib}
@article{scherrer2012helioseismic,
author = {{Scherrer}, P.~H. and {Schou}, J. and {Bush}, R.~I. and {Kosovichev}, A.~G. and {Bogart}, R.~S. and {Hoeksema}, J.~T. and {Liu}, Y. and {Duvall}, T.~L. and {Zhao}, J. and {Title}, A.~M. and {Schrijver}, C.~J. and {Tarbell}, T.~D. and {Tomczyk}, S.},
title = "{The Helioseismic and Magnetic Imager (HMI) Investigation for the Solar Dynamics Observatory (SDO)}",
year = 2012}
\end{filecontents*}
\usepackage[natbib,citestyle=authoryear,backend=biber]{biblatex}
\addbibresource{bibliography.bib}
\usepackage{acro}
\acsetup{
single = false,
sort = true,
group-citation = true,
group-cite-cmd = \citealp
}
\DeclareAcronym{HMI}{
short = HMI,
long = Helioseismic and Magnetic Imager,
cite = {scherrer2012helioseismic}
}
\begin{document}
I need this to say ``Helioseismic and Magnetic Imager (HMI; Scherrer et al., 2012)''.
But right now, I get ``\ac{HMI}''.
\end{document}
Is it possible to change the separator between the acronym and citation from a comma to a semicolon?

group-cite-connect = {; }to the \acsetup was exactly what I needed! – ajsolar Aug 02 '18 at 13:04