ortp.dll, alut.dll and wrap_oal.dll. SLVoice.exe external daemon software started and stopped by the Second Life Viewer ( SL wiki ). More precisely, SLVoice.exe is a daemon that receives calls from the SL Viewer through a local TCP server (default is 127.0.0.1:44124). Also named client gateway, SLVoice.exe is the proprietary black box