yast2-sound from YaST:SLE-12:SP4 project
Select Your Operating System
Add repository and install manually
For openSUSE Leap 42.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/YaST:SLE-12:SP4/openSUSE_Leap_42.3/YaST:SLE-12:SP4.repo zypper refresh zypper install yast2-sound
Grab binary packages directly
Add repository and install manually
For SLE 12 SP4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/YaST:SLE-12:SP4/SLE_12_SP4/YaST:SLE-12:SP4.repo zypper refresh zypper install yast2-sound