For openSUSE Leap 42.1 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:wolfi323:branches:home:wolfi323/openSUSE_Leap_42.1/home:wolfi323:branches:home:wolfi323.repo
zypper refresh
zypper install aacgain
For openSUSE 13.2 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:wolfi323:branches:home:wolfi323/openSUSE_13.2/home:wolfi323:branches:home:wolfi323.repo
zypper refresh
zypper install aacgain
For openSUSE 13.1 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:wolfi323:branches:home:wolfi323/openSUSE_13.1/home:wolfi323:branches:home:wolfi323.repo
zypper refresh
zypper install aacgain