For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/X11:Unity/openSUSE_Tumbleweed/X11:Unity.repo
zypper refresh
zypper install sound-theme-yaru
For openSUSE Factory RISCV run the following as root:
zypper addrepo https://download.opensuse.org/repositories/X11:Unity/openSUSE_Factory_RISCV/X11:Unity.repo
zypper refresh
zypper install sound-theme-yaru
For openSUSE Factory PowerPC run the following as root:
zypper addrepo https://download.opensuse.org/repositories/X11:Unity/openSUSE_Factory_PowerPC/X11:Unity.repo
zypper refresh
zypper install sound-theme-yaru
For openSUSE Factory ARM run the following as root:
zypper addrepo https://download.opensuse.org/repositories/X11:Unity/openSUSE_Factory_ARM/X11:Unity.repo
zypper refresh
zypper install sound-theme-yaru